/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 --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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 14:39:13,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 14:39:13,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 14:39:13,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 14:39:13,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 14:39:13,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 14:39:13,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 14:39:13,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 14:39:13,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 14:39:13,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 14:39:13,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 14:39:13,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 14:39:13,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 14:39:13,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 14:39:13,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 14:39:13,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 14:39:13,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 14:39:13,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 14:39:13,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 14:39:13,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 14:39:13,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 14:39:13,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 14:39:13,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 14:39:13,137 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 14:39:13,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 14:39:13,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 14:39:13,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 14:39:13,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 14:39:13,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 14:39:13,148 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 14:39:13,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 14:39:13,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 14:39:13,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 14:39:13,151 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 14:39:13,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 14:39:13,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 14:39:13,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 14:39:13,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 14:39:13,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 14:39:13,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 14:39:13,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 14:39:13,159 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 [2020-09-25 14:39:13,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 14:39:13,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 14:39:13,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 14:39:13,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 14:39:13,219 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 14:39:13,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 14:39:13,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 14:39:13,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 14:39:13,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 14:39:13,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 14:39:13,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 14:39:13,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 14:39:13,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 14:39:13,223 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 14:39:13,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 14:39:13,223 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 14:39:13,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 14:39:13,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 14:39:13,224 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 14:39:13,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 14:39:13,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 14:39:13,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 14:39:13,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 14:39:13,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 14:39:13,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 14:39:13,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 14:39:13,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 14:39:13,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 14:39:13,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 14:39:13,227 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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;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=SMALLESTAMONGWIDE;tolerance=0.5;log-additional-information=true; [2020-09-25 14:39:13,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 14:39:13,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 14:39:13,670 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 14:39:13,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 14:39:13,672 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 14:39:13,673 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2020-09-25 14:39:13,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/929f41115/d2861dfad04843faabe299a0b8986cc3/FLAGa22cf0ad0 [2020-09-25 14:39:14,377 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 14:39:14,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label18.c [2020-09-25 14:39:14,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/929f41115/d2861dfad04843faabe299a0b8986cc3/FLAGa22cf0ad0 [2020-09-25 14:39:14,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/929f41115/d2861dfad04843faabe299a0b8986cc3 [2020-09-25 14:39:14,651 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 14:39:14,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 14:39:14,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 14:39:14,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 14:39:14,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 14:39:14,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:39:14" (1/1) ... [2020-09-25 14:39:14,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1058f97b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:14, skipping insertion in model container [2020-09-25 14:39:14,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:39:14" (1/1) ... [2020-09-25 14:39:14,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 14:39:14,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 14:39:15,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:39:15,211 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 14:39:15,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 14:39:15,431 INFO L208 MainTranslator]: Completed translation [2020-09-25 14:39:15,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15 WrapperNode [2020-09-25 14:39:15,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 14:39:15,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 14:39:15,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 14:39:15,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 14:39:15,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (1/1) ... [2020-09-25 14:39:15,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 14:39:15,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 14:39:15,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 14:39:15,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 14:39:15,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (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 [2020-09-25 14:39:15,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 14:39:15,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 14:39:15,631 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 14:39:15,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 14:39:15,632 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 14:39:15,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 14:39:15,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 14:39:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 14:39:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 14:39:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 14:39:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 14:39:16,915 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 14:39:16,916 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 14:39:16,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:39:16 BoogieIcfgContainer [2020-09-25 14:39:16,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 14:39:16,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 14:39:16,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 14:39:16,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 14:39:16,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:39:14" (1/3) ... [2020-09-25 14:39:16,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336222d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:39:16, skipping insertion in model container [2020-09-25 14:39:16,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:39:15" (2/3) ... [2020-09-25 14:39:16,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336222d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:39:16, skipping insertion in model container [2020-09-25 14:39:16,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:39:16" (3/3) ... [2020-09-25 14:39:16,935 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label18.c [2020-09-25 14:39:16,947 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 14:39:16,958 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 14:39:16,980 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 14:39:17,015 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 14:39:17,015 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 14:39:17,015 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 14:39:17,016 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 14:39:17,016 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 14:39:17,016 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 14:39:17,016 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 14:39:17,016 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 14:39:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 14:39:17,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-09-25 14:39:17,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:17,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:39:17,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1150212666, now seen corresponding path program 1 times [2020-09-25 14:39:17,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:17,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843007766] [2020-09-25 14:39:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:17,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:17,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:17,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:18,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:18,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:19,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:19,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:20,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:20,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:21,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:22,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-09-25 14:39:22,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 14:39:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-09-25 14:39:22,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:22,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:22,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:39:22,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 14:39:22,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-25 14:39:22,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 14:39:22,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:22,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:22,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:22,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:22,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:22,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-25 14:39:22,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:22,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:22,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:22,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:22,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 14:39:22,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:22,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843007766] [2020-09-25 14:39:22,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 14:39:22,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 14:39:22,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485581005] [2020-09-25 14:39:22,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 14:39:22,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 14:39:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 14:39:22,707 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 14:39:24,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:24,881 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 14:39:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 14:39:24,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-09-25 14:39:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:24,907 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 14:39:24,907 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 14:39:24,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 14:39:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 14:39:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 14:39:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 14:39:25,013 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 153 [2020-09-25 14:39:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:25,014 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 14:39:25,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 14:39:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 14:39:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-09-25 14:39:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:25,022 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:39:25,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 14:39:25,023 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:25,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:25,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1363123039, now seen corresponding path program 1 times [2020-09-25 14:39:25,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:25,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519209961] [2020-09-25 14:39:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:25,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:25,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:25,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:25,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:27,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:28,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:30,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-09-25 14:39:30,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:39:30,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 14:39:30,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:30,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 14:39:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 14:39:30,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:30,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:30,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:30,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 14:39:30,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:30,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:30,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:30,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:30,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:30,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 14:39:30,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:30,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 14:39:30,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:30,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:30,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 14:39:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:30,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519209961] [2020-09-25 14:39:30,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:30,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:30,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367284272] [2020-09-25 14:39:30,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:30,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:30,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:30,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:30,313 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 5 states. [2020-09-25 14:39:32,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:32,429 INFO L93 Difference]: Finished difference Result 1400 states and 1694 transitions. [2020-09-25 14:39:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:32,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-09-25 14:39:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:32,436 INFO L225 Difference]: With dead ends: 1400 [2020-09-25 14:39:32,436 INFO L226 Difference]: Without dead ends: 801 [2020-09-25 14:39:32,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2020-09-25 14:39:32,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 776. [2020-09-25 14:39:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-09-25 14:39:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 898 transitions. [2020-09-25 14:39:32,481 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 898 transitions. Word has length 170 [2020-09-25 14:39:32,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:32,482 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 898 transitions. [2020-09-25 14:39:32,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 898 transitions. [2020-09-25 14:39:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-25 14:39:32,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:32,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:39:32,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 14:39:32,489 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:32,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:32,489 INFO L82 PathProgramCache]: Analyzing trace with hash -448205160, now seen corresponding path program 1 times [2020-09-25 14:39:32,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:32,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928682820] [2020-09-25 14:39:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:32,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:32,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:33,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:33,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:36,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:36,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:36,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:37,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:37,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-09-25 14:39:37,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 14:39:37,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 14:39:37,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:37,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 14:39:37,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-09-25 14:39:37,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:37,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:37,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:37,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:37,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:37,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:37,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 14:39:37,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:37,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:37,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:37,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:37,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:37,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:37,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:37,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 14:39:37,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:37,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-25 14:39:37,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:37,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:37,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:37,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 14:39:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:37,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928682820] [2020-09-25 14:39:37,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:37,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:37,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430496236] [2020-09-25 14:39:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:37,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:37,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:37,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:37,951 INFO L87 Difference]: Start difference. First operand 776 states and 898 transitions. Second operand 5 states. [2020-09-25 14:39:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:40,159 INFO L93 Difference]: Finished difference Result 2094 states and 2489 transitions. [2020-09-25 14:39:40,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:40,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-09-25 14:39:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:40,167 INFO L225 Difference]: With dead ends: 2094 [2020-09-25 14:39:40,167 INFO L226 Difference]: Without dead ends: 1340 [2020-09-25 14:39:40,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2020-09-25 14:39:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1242. [2020-09-25 14:39:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1242 states. [2020-09-25 14:39:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1463 transitions. [2020-09-25 14:39:40,210 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1463 transitions. Word has length 175 [2020-09-25 14:39:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:40,211 INFO L479 AbstractCegarLoop]: Abstraction has 1242 states and 1463 transitions. [2020-09-25 14:39:40,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1463 transitions. [2020-09-25 14:39:40,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-09-25 14:39:40,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:40,217 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:39:40,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 14:39:40,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:40,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1470233577, now seen corresponding path program 1 times [2020-09-25 14:39:40,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:40,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270978902] [2020-09-25 14:39:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:40,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:40,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:40,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:41,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:41,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:42,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:42,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:44,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:45,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-09-25 14:39:45,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 14:39:45,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 14:39:45,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:45,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 14:39:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-09-25 14:39:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-09-25 14:39:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 14:39:45,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:45,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:45,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:45,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:45,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-25 14:39:45,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:45,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:45,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 14:39:45,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:45,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 14:39:45,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:45,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:45,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:45,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:45,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:45,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 14:39:45,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:45,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:45,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 14:39:45,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:45,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270978902] [2020-09-25 14:39:45,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:45,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 14:39:45,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888488335] [2020-09-25 14:39:45,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 14:39:45,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 14:39:45,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 14:39:45,529 INFO L87 Difference]: Start difference. First operand 1242 states and 1463 transitions. Second operand 5 states. [2020-09-25 14:39:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:39:47,677 INFO L93 Difference]: Finished difference Result 2843 states and 3469 transitions. [2020-09-25 14:39:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 14:39:47,679 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2020-09-25 14:39:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:39:47,689 INFO L225 Difference]: With dead ends: 2843 [2020-09-25 14:39:47,689 INFO L226 Difference]: Without dead ends: 1623 [2020-09-25 14:39:47,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 14:39:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2020-09-25 14:39:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1546. [2020-09-25 14:39:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-09-25 14:39:47,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 1849 transitions. [2020-09-25 14:39:47,760 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 1849 transitions. Word has length 182 [2020-09-25 14:39:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:39:47,761 INFO L479 AbstractCegarLoop]: Abstraction has 1546 states and 1849 transitions. [2020-09-25 14:39:47,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 14:39:47,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 1849 transitions. [2020-09-25 14:39:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-09-25 14:39:47,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:39:47,769 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 14:39:47,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 14:39:47,769 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:39:47,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:39:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1077907039, now seen corresponding path program 1 times [2020-09-25 14:39:47,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:39:47,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286254951] [2020-09-25 14:39:47,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:39:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:47,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:47,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:48,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:48,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:50,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:51,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:51,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:52,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:52,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-09-25 14:39:52,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 14:39:52,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 14:39:52,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:52,799 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 14:39:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 14:39:52,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-09-25 14:39:52,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:53,356 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-09-25 14:39:53,547 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-09-25 14:39:53,711 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2020-09-25 14:39:53,862 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-09-25 14:39:54,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 14:39:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:54,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:54,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:54,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 14:39:54,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 14:39:54,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 14:39:54,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:54,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 14:39:54,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:54,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 14:39:54,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:54,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 14:39:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:39:54,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:54,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:39:54,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 14:39:54,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 14:39:54,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 14:39:54,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-09-25 14:39:54,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 14:39:54,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.5 [2020-09-25 14:39:54,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 14:39:54,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 14:39:54,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 14:39:54,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 14:39:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 14:39:54,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286254951] [2020-09-25 14:39:54,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 14:39:54,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 14:39:54,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783652326] [2020-09-25 14:39:54,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 14:39:54,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 14:39:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 14:39:54,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-09-25 14:39:54,532 INFO L87 Difference]: Start difference. First operand 1546 states and 1849 transitions. Second operand 16 states. [2020-09-25 14:39:56,414 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-09-25 14:39:58,329 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2020-09-25 14:39:58,700 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 95 [2020-09-25 14:39:59,253 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 92 [2020-09-25 14:39:59,443 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-09-25 14:39:59,876 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2020-09-25 14:40:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 14:40:00,762 INFO L93 Difference]: Finished difference Result 5054 states and 6384 transitions. [2020-09-25 14:40:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 14:40:00,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 188 [2020-09-25 14:40:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 14:40:00,789 INFO L225 Difference]: With dead ends: 5054 [2020-09-25 14:40:00,789 INFO L226 Difference]: Without dead ends: 3530 [2020-09-25 14:40:00,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-09-25 14:40:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2020-09-25 14:40:00,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3176. [2020-09-25 14:40:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3176 states. [2020-09-25 14:40:00,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 3820 transitions. [2020-09-25 14:40:00,910 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 3820 transitions. Word has length 188 [2020-09-25 14:40:00,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 14:40:00,911 INFO L479 AbstractCegarLoop]: Abstraction has 3176 states and 3820 transitions. [2020-09-25 14:40:00,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 14:40:00,911 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 3820 transitions. [2020-09-25 14:40:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-09-25 14:40:00,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 14:40:00,925 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2020-09-25 14:40:00,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 14:40:00,925 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 14:40:00,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 14:40:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash 205247439, now seen corresponding path program 1 times [2020-09-25 14:40:00,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 14:40:00,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614286853] [2020-09-25 14:40:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 14:40:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 14:40:00,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:01,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:01,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 14:40:02,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking...