/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:39:37,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:39:37,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:39:37,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:39:37,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:39:37,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:39:37,151 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:39:37,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:39:37,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:39:37,161 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:39:37,162 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:39:37,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:39:37,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:39:37,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:39:37,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:39:37,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:39:37,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:39:37,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:39:37,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:39:37,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:39:37,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:39:37,192 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:39:37,194 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:39:37,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:39:37,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:39:37,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:39:37,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:39:37,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:39:37,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:39:37,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:39:37,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:39:37,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:39:37,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:39:37,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:39:37,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:39:37,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:39:37,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:39:37,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:39:37,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:39:37,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:39:37,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:39:37,212 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 21:39:37,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:39:37,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:39:37,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:39:37,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:39:37,266 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:39:37,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:39:37,266 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:39:37,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:39:37,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:39:37,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:39:37,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:39:37,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:39:37,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:39:37,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:39:37,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:39:37,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:39:37,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:39:37,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:39:37,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:39:37,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:39:37,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:39:37,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:39:37,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:39:37,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:39:37,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:39:37,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:39:37,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:39:37,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:39:37,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:39:37,272 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 21:39:37,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:39:37,736 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:39:37,741 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:39:37,743 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:39:37,743 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:39:37,745 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label34.c [2020-09-24 21:39:37,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53559d43b/6b3112ff6c9d4a5884535c2698708eb2/FLAG23e218e66 [2020-09-24 21:39:38,506 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:39:38,507 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label34.c [2020-09-24 21:39:38,522 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53559d43b/6b3112ff6c9d4a5884535c2698708eb2/FLAG23e218e66 [2020-09-24 21:39:38,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/53559d43b/6b3112ff6c9d4a5884535c2698708eb2 [2020-09-24 21:39:38,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:39:38,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:39:38,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:38,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:39:38,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:39:38,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:38" (1/1) ... [2020-09-24 21:39:38,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d0614b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:38, skipping insertion in model container [2020-09-24 21:39:38,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:39:38" (1/1) ... [2020-09-24 21:39:38,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:39:38,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:39:39,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:39,403 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:39:39,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:39:39,545 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:39:39,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39 WrapperNode [2020-09-24 21:39:39,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:39:39,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:39:39,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:39:39,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:39:39,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (1/1) ... [2020-09-24 21:39:39,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:39:39,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:39:39,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:39:39,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:39:39,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (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 21:39:39,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:39:39,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:39:39,756 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:39:39,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:39:39,757 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:39:39,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:39:39,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:39:39,757 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:39:39,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:39:39,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:39:39,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:39:41,162 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:39:41,162 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:39:41,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:41 BoogieIcfgContainer [2020-09-24 21:39:41,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:39:41,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:39:41,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:39:41,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:39:41,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:39:38" (1/3) ... [2020-09-24 21:39:41,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c474df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:41, skipping insertion in model container [2020-09-24 21:39:41,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:39:39" (2/3) ... [2020-09-24 21:39:41,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c474df6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:39:41, skipping insertion in model container [2020-09-24 21:39:41,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:39:41" (3/3) ... [2020-09-24 21:39:41,182 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label34.c [2020-09-24 21:39:41,195 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:39:41,206 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:39:41,229 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:39:41,264 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:39:41,265 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:39:41,265 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:39:41,265 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:39:41,265 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:39:41,265 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:39:41,266 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:39:41,266 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:39:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:39:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 21:39:41,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:41,324 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] [2020-09-24 21:39:41,325 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:41,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:41,333 INFO L82 PathProgramCache]: Analyzing trace with hash 319545741, now seen corresponding path program 1 times [2020-09-24 21:39:41,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:41,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828324473] [2020-09-24 21:39:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:41,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:42,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:42,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:43,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:46,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:46,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:46,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-09-24 21:39:46,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:39:46,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 21:39:46,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:46,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:39:46,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:39:46,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:39:46,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:39:47,423 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-09-24 21:39:47,637 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-09-24 21:39:47,888 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 47 [2020-09-24 21:39:48,109 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-09-24 21:39:48,317 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 41 [2020-09-24 21:39:48,501 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2020-09-24 21:39:48,659 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 33 [2020-09-24 21:39:48,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:39:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:48,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:48,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:39:48,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:39:48,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:39:48,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 21:39:48,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:39:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:39:48,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:39:48,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:39:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:39:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:39:49,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828324473] [2020-09-24 21:39:49,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:39:49,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:39:49,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541872402] [2020-09-24 21:39:49,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:39:49,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:39:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:39:49,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:39:49,253 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:39:49,519 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-09-24 21:39:49,736 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-09-24 21:39:49,882 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-09-24 21:39:50,117 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-09-24 21:39:50,507 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 113 [2020-09-24 21:39:50,898 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 110 [2020-09-24 21:39:51,509 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 107 [2020-09-24 21:39:52,730 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 104 [2020-09-24 21:39:53,345 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 99 [2020-09-24 21:39:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:39:57,700 INFO L93 Difference]: Finished difference Result 1700 states and 2421 transitions. [2020-09-24 21:39:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 21:39:57,702 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 133 [2020-09-24 21:39:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:39:57,756 INFO L225 Difference]: With dead ends: 1700 [2020-09-24 21:39:57,756 INFO L226 Difference]: Without dead ends: 1101 [2020-09-24 21:39:57,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=303, Invalid=627, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:39:57,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-09-24 21:39:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 985. [2020-09-24 21:39:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:39:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1147 transitions. [2020-09-24 21:39:57,896 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1147 transitions. Word has length 133 [2020-09-24 21:39:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:39:57,897 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1147 transitions. [2020-09-24 21:39:57,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:39:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1147 transitions. [2020-09-24 21:39:57,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-24 21:39:57,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:39:57,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:39:57,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:39:57,917 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:39:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:39:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash 972800578, now seen corresponding path program 1 times [2020-09-24 21:39:57,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:39:57,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761374588] [2020-09-24 21:39:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:39:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:39:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:58,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:39:58,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:01,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:02,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:03,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:03,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-09-24 21:40:03,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:40:03,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-09-24 21:40:03,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:03,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:40:03,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 21:40:03,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-24 21:40:03,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:03,751 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-09-24 21:40:03,905 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-09-24 21:40:04,045 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2020-09-24 21:40:04,189 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2020-09-24 21:40:04,331 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2020-09-24 21:40:04,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:04,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:04,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:04,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:04,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 21:40:04,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:04,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:04,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:04,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:04,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:04,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:04,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:04,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:04,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:04,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 21:40:04,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:04,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:04,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:04,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:04,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:04,805 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2020-09-24 21:40:04,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 21:40:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:05,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:05,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:05,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-24 21:40:05,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:05,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:05,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:40:05,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761374588] [2020-09-24 21:40:05,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:05,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:40:05,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125925670] [2020-09-24 21:40:05,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:40:05,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:05,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:40:05,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:40:05,527 INFO L87 Difference]: Start difference. First operand 985 states and 1147 transitions. Second operand 23 states. [2020-09-24 21:40:06,394 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-09-24 21:40:07,203 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2020-09-24 21:40:08,480 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-09-24 21:40:09,615 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2020-09-24 21:40:09,966 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2020-09-24 21:40:10,820 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-09-24 21:40:11,278 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2020-09-24 21:40:11,562 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 80 [2020-09-24 21:40:11,856 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-09-24 21:40:12,162 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2020-09-24 21:40:12,481 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2020-09-24 21:40:12,896 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2020-09-24 21:40:13,820 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2020-09-24 21:40:14,899 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-09-24 21:40:15,312 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2020-09-24 21:40:15,563 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-09-24 21:40:16,293 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 90 [2020-09-24 21:40:16,484 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-09-24 21:40:16,850 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-09-24 21:40:17,228 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2020-09-24 21:40:18,286 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 87 [2020-09-24 21:40:20,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:20,114 INFO L93 Difference]: Finished difference Result 3514 states and 4500 transitions. [2020-09-24 21:40:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 21:40:20,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 171 [2020-09-24 21:40:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:20,141 INFO L225 Difference]: With dead ends: 3514 [2020-09-24 21:40:20,142 INFO L226 Difference]: Without dead ends: 2617 [2020-09-24 21:40:20,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=936, Invalid=2846, Unknown=0, NotChecked=0, Total=3782 [2020-09-24 21:40:20,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2020-09-24 21:40:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2190. [2020-09-24 21:40:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2190 states. [2020-09-24 21:40:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 2653 transitions. [2020-09-24 21:40:20,279 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 2653 transitions. Word has length 171 [2020-09-24 21:40:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:20,281 INFO L479 AbstractCegarLoop]: Abstraction has 2190 states and 2653 transitions. [2020-09-24 21:40:20,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:40:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 2653 transitions. [2020-09-24 21:40:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-24 21:40:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:20,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:20,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:20,302 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:20,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2029561996, now seen corresponding path program 1 times [2020-09-24 21:40:20,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:20,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275948778] [2020-09-24 21:40:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 21:40:25,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 21:40:25,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-24 21:40:25,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:25,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 21:40:25,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:40:25,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:25,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:25,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:25,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-24 21:40:25,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:40:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:25,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:25,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:25,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:25,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:25,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:25,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:40:25,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:25,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:25,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:25,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:25,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-09-24 21:40:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:25,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:25,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:25,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:25,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:25,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-24 21:40:25,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:40:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-24 21:40:25,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275948778] [2020-09-24 21:40:25,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:25,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:40:25,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197903109] [2020-09-24 21:40:25,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:40:25,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:25,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:40:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:40:25,794 INFO L87 Difference]: Start difference. First operand 2190 states and 2653 transitions. Second operand 8 states. [2020-09-24 21:40:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:28,295 INFO L93 Difference]: Finished difference Result 5537 states and 7079 transitions. [2020-09-24 21:40:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:40:28,296 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 175 [2020-09-24 21:40:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:28,321 INFO L225 Difference]: With dead ends: 5537 [2020-09-24 21:40:28,321 INFO L226 Difference]: Without dead ends: 3435 [2020-09-24 21:40:28,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:40:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2020-09-24 21:40:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3319. [2020-09-24 21:40:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3319 states. [2020-09-24 21:40:28,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 4087 transitions. [2020-09-24 21:40:28,455 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 4087 transitions. Word has length 175 [2020-09-24 21:40:28,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:28,457 INFO L479 AbstractCegarLoop]: Abstraction has 3319 states and 4087 transitions. [2020-09-24 21:40:28,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:40:28,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 4087 transitions. [2020-09-24 21:40:28,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-24 21:40:28,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:28,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:40:28,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:40:28,474 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash -699904969, now seen corresponding path program 1 times [2020-09-24 21:40:28,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:28,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803398773] [2020-09-24 21:40:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:28,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:28,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:29,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking...