/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=0.2 --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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:15:32,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:15:32,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:15:32,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:15:32,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:15:32,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:15:32,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:15:32,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:15:32,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:15:32,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:15:32,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:15:32,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:15:32,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:15:32,557 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:15:32,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:15:32,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:15:32,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:15:32,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:15:32,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:15:32,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:15:32,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:15:32,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:15:32,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:15:32,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:15:32,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:15:32,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:15:32,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:15:32,594 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:15:32,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:15:32,595 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:15:32,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:15:32,596 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:15:32,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:15:32,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:15:32,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:15:32,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:15:32,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:15:32,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:15:32,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:15:32,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:15:32,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:15:32,606 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 11:15:32,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:15:32,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:15:32,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:15:32,654 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:15:32,654 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:15:32,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:15:32,655 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:15:32,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:15:32,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:15:32,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:15:32,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:15:32,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:15:32,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:15:32,657 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:15:32,658 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:15:32,658 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:15:32,658 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:15:32,658 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:15:32,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:15:32,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:15:32,659 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:15:32,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:15:32,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:15:32,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:15:32,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:15:32,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:15:32,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:15:32,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:15:32,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:15:32,661 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 11:15:33,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:15:33,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:15:33,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:15:33,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:15:33,124 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:15:33,125 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2020-09-25 11:15:33,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/697cd0e91/1864d105895b409a9988e24995f310bc/FLAG529f974b2 [2020-09-25 11:15:33,857 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:15:33,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label08.c [2020-09-25 11:15:33,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/697cd0e91/1864d105895b409a9988e24995f310bc/FLAG529f974b2 [2020-09-25 11:15:34,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/697cd0e91/1864d105895b409a9988e24995f310bc [2020-09-25 11:15:34,172 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:15:34,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:15:34,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:15:34,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:15:34,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:15:34,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:34,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34, skipping insertion in model container [2020-09-25 11:15:34,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:34,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:15:34,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:15:34,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:15:34,792 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:15:34,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:15:34,987 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:15:34,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34 WrapperNode [2020-09-25 11:15:34,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:15:34,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:15:34,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:15:34,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:15:35,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,023 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,024 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,069 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (1/1) ... [2020-09-25 11:15:35,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:15:35,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:15:35,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:15:35,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:15:35,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (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 11:15:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:15:35,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:15:35,179 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-25 11:15:35,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:15:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-25 11:15:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:15:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 11:15:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 11:15:35,179 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:15:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:15:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:15:36,430 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:15:36,430 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 11:15:36,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:15:36 BoogieIcfgContainer [2020-09-25 11:15:36,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:15:36,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:15:36,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:15:36,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:15:36,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:15:34" (1/3) ... [2020-09-25 11:15:36,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71979beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:15:36, skipping insertion in model container [2020-09-25 11:15:36,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:15:34" (2/3) ... [2020-09-25 11:15:36,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71979beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:15:36, skipping insertion in model container [2020-09-25 11:15:36,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:15:36" (3/3) ... [2020-09-25 11:15:36,449 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label08.c [2020-09-25 11:15:36,460 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:15:36,471 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:15:36,493 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:15:36,529 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:15:36,529 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:15:36,530 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:15:36,530 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:15:36,530 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:15:36,530 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:15:36,530 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:15:36,531 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:15:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states. [2020-09-25 11:15:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-09-25 11:15:36,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:36,588 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] [2020-09-25 11:15:36,588 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:36,597 INFO L82 PathProgramCache]: Analyzing trace with hash 524055129, now seen corresponding path program 1 times [2020-09-25 11:15:36,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:36,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554159653] [2020-09-25 11:15:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:37,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:37,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:38,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:38,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:39,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:40,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:40,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:41,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:41,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:41,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-09-25 11:15:41,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 11:15:41,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 11:15:41,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:41,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:15:41,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 11:15:41,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-09-25 11:15:41,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-25 11:15:42,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:42,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:42,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:42,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:42,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:42,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-25 11:15:42,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:42,149 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:42,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:42,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:42,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:15:42,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:42,226 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 11:15:42,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554159653] [2020-09-25 11:15:42,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:15:42,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 11:15:42,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760849729] [2020-09-25 11:15:42,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 11:15:42,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:42,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 11:15:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 11:15:42,262 INFO L87 Difference]: Start difference. First operand 527 states. Second operand 4 states. [2020-09-25 11:15:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:44,352 INFO L93 Difference]: Finished difference Result 1248 states and 1696 transitions. [2020-09-25 11:15:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 11:15:44,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-09-25 11:15:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:44,392 INFO L225 Difference]: With dead ends: 1248 [2020-09-25 11:15:44,392 INFO L226 Difference]: Without dead ends: 670 [2020-09-25 11:15:44,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 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 11:15:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-09-25 11:15:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 621. [2020-09-25 11:15:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-09-25 11:15:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 723 transitions. [2020-09-25 11:15:44,569 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 723 transitions. Word has length 148 [2020-09-25 11:15:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:44,573 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 723 transitions. [2020-09-25 11:15:44,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 11:15:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 723 transitions. [2020-09-25 11:15:44,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-25 11:15:44,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:44,586 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] [2020-09-25 11:15:44,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:15:44,587 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1559872402, now seen corresponding path program 1 times [2020-09-25 11:15:44,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:44,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971459868] [2020-09-25 11:15:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:44,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:44,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:44,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:45,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:46,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:46,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:47,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:49,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:49,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-25 11:15:49,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:15:49,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-09-25 11:15:49,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:49,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 11:15:49,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-09-25 11:15:49,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:49,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:49,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:49,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:49,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:49,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:49,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:15:49,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:49,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:49,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:49,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:49,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:15:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:49,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:49,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:49,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:15:49,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:49,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 11:15:49,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:49,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:49,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 11:15:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:49,936 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 11:15:49,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971459868] [2020-09-25 11:15:49,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:49,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:15:49,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953209446] [2020-09-25 11:15:49,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:15:49,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:15:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:15:49,940 INFO L87 Difference]: Start difference. First operand 621 states and 723 transitions. Second operand 6 states. [2020-09-25 11:15:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:51,935 INFO L93 Difference]: Finished difference Result 1533 states and 1846 transitions. [2020-09-25 11:15:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:15:51,936 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2020-09-25 11:15:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:51,942 INFO L225 Difference]: With dead ends: 1533 [2020-09-25 11:15:51,942 INFO L226 Difference]: Without dead ends: 934 [2020-09-25 11:15:51,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:15:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2020-09-25 11:15:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 772. [2020-09-25 11:15:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2020-09-25 11:15:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 953 transitions. [2020-09-25 11:15:51,979 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 953 transitions. Word has length 165 [2020-09-25 11:15:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:51,980 INFO L479 AbstractCegarLoop]: Abstraction has 772 states and 953 transitions. [2020-09-25 11:15:51,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:15:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 953 transitions. [2020-09-25 11:15:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-09-25 11:15:51,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:51,984 INFO L422 BasicCegarLoop]: trace histogram [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 11:15:51,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:15:51,984 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:51,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:51,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1407285362, now seen corresponding path program 1 times [2020-09-25 11:15:51,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:51,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558319792] [2020-09-25 11:15:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:52,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:52,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:53,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:54,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:55,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:57,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:57,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-09-25 11:15:57,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:15:57,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-09-25 11:15:57,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:57,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:57,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:15:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-09-25 11:15:57,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-09-25 11:15:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:57,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:15:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:57,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:57,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:57,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:15:57,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:57,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:15:57,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:57,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:57,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:15:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:15:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:57,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:15:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:57,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:57,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:15:57,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 11:15:57,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:15:57,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:15:57,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:15:57,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:15:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:15:57,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:15:57,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 11:15:57,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:15:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:15:57,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558319792] [2020-09-25 11:15:57,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:15:57,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:15:57,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223040171] [2020-09-25 11:15:57,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:15:57,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:15:57,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:15:57,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:15:57,290 INFO L87 Difference]: Start difference. First operand 772 states and 953 transitions. Second operand 5 states. [2020-09-25 11:15:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:15:59,309 INFO L93 Difference]: Finished difference Result 2144 states and 2711 transitions. [2020-09-25 11:15:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:15:59,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 174 [2020-09-25 11:15:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:15:59,317 INFO L225 Difference]: With dead ends: 2144 [2020-09-25 11:15:59,317 INFO L226 Difference]: Without dead ends: 1394 [2020-09-25 11:15:59,320 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 11:15:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2020-09-25 11:15:59,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1189. [2020-09-25 11:15:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1189 states. [2020-09-25 11:15:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1456 transitions. [2020-09-25 11:15:59,359 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1456 transitions. Word has length 174 [2020-09-25 11:15:59,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:15:59,359 INFO L479 AbstractCegarLoop]: Abstraction has 1189 states and 1456 transitions. [2020-09-25 11:15:59,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:15:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1456 transitions. [2020-09-25 11:15:59,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-25 11:15:59,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:15:59,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:15:59,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:15:59,366 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:15:59,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:15:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1964043123, now seen corresponding path program 1 times [2020-09-25 11:15:59,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:15:59,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202434713] [2020-09-25 11:15:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:15:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:15:59,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:59,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:15:59,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:00,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:00,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:04,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:04,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:04,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:04,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-09-25 11:16:04,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:16:04,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 11:16:04,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:04,412 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:04,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:04,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-09-25 11:16:04,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-09-25 11:16:04,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:04,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:04,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:04,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:04,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:04,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:16:04,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:04,532 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:04,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:04,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:04,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:04,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:04,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:04,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:04,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:16:04,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:04,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 11:16:04,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:04,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:04,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:04,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:04,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:16:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:04,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:04,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:04,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-25 11:16:04,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:04,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 11:16:04,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:04,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:04,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:04,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:16:04,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-25 11:16:04,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202434713] [2020-09-25 11:16:04,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:04,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 11:16:04,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058253676] [2020-09-25 11:16:04,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 11:16:04,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:04,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 11:16:04,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 11:16:04,667 INFO L87 Difference]: Start difference. First operand 1189 states and 1456 transitions. Second operand 5 states. [2020-09-25 11:16:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:06,660 INFO L93 Difference]: Finished difference Result 3234 states and 4082 transitions. [2020-09-25 11:16:06,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 11:16:06,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-09-25 11:16:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:06,674 INFO L225 Difference]: With dead ends: 3234 [2020-09-25 11:16:06,674 INFO L226 Difference]: Without dead ends: 2067 [2020-09-25 11:16:06,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 11:16:06,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2020-09-25 11:16:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1853. [2020-09-25 11:16:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1853 states. [2020-09-25 11:16:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2220 transitions. [2020-09-25 11:16:06,745 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2220 transitions. Word has length 199 [2020-09-25 11:16:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:06,746 INFO L479 AbstractCegarLoop]: Abstraction has 1853 states and 2220 transitions. [2020-09-25 11:16:06,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 11:16:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2220 transitions. [2020-09-25 11:16:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-25 11:16:06,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:06,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:16:06,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:16:06,756 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1347648009, now seen corresponding path program 1 times [2020-09-25 11:16:06,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:06,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040043233] [2020-09-25 11:16:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:06,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:06,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:06,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:07,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:08,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:08,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:10,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-25 11:16:11,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:16:11,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-09-25 11:16:11,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:11,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-09-25 11:16:11,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-09-25 11:16:11,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:11,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:11,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:11,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:16:11,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:11,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:11,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:11,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:11,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:11,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:11,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:16:11,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:11,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:16:11,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:11,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:11,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 11:16:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:16:11,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:16:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:11,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:12,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:12,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:16:12,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 11:16:12,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-09-25 11:16:12,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:12,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:12,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:12,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:16:12,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-09-25 11:16:12,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:16:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-25 11:16:12,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040043233] [2020-09-25 11:16:12,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:12,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:16:12,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140177887] [2020-09-25 11:16:12,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:16:12,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:12,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:16:12,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:16:12,128 INFO L87 Difference]: Start difference. First operand 1853 states and 2220 transitions. Second operand 7 states. [2020-09-25 11:16:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:14,137 INFO L93 Difference]: Finished difference Result 4333 states and 5415 transitions. [2020-09-25 11:16:14,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:16:14,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 205 [2020-09-25 11:16:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:14,155 INFO L225 Difference]: With dead ends: 4333 [2020-09-25 11:16:14,157 INFO L226 Difference]: Without dead ends: 2502 [2020-09-25 11:16:14,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:16:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2020-09-25 11:16:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2319. [2020-09-25 11:16:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2319 states. [2020-09-25 11:16:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2933 transitions. [2020-09-25 11:16:14,241 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2933 transitions. Word has length 205 [2020-09-25 11:16:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:14,242 INFO L479 AbstractCegarLoop]: Abstraction has 2319 states and 2933 transitions. [2020-09-25 11:16:14,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:16:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2933 transitions. [2020-09-25 11:16:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-09-25 11:16:14,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:14,254 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-09-25 11:16:14,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:16:14,255 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash 412144330, now seen corresponding path program 1 times [2020-09-25 11:16:14,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:14,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371597668] [2020-09-25 11:16:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:14,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:14,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:14,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:15,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:15,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:18,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:19,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-09-25 11:16:19,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 11:16:19,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 11:16:19,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:19,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:19,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:16:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-09-25 11:16:19,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-09-25 11:16:19,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:19,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:16:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:19,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:19,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 11:16:19,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:19,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 11:16:19,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:19,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:19,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:19,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:19,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-25 11:16:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:19,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:19,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 11:16:19,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:19,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 11:16:19,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:19,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:16:19,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:19,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:16:19,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:19,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-25 11:16:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:19,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:19,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-09-25 11:16:19,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:16:19,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 11:16:19,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:19,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:16:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:16:19,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 11:16:19,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:19,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-25 11:16:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:19,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:19,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:16:19,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 11:16:19,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:16:19,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-09-25 11:16:19,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:16:19,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:16:19,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 11:16:19,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-25 11:16:19,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-25 11:16:19,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:16:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 112 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 11:16:20,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371597668] [2020-09-25 11:16:20,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:16:20,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 11:16:20,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833948648] [2020-09-25 11:16:20,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 11:16:20,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:16:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 11:16:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-25 11:16:20,075 INFO L87 Difference]: Start difference. First operand 2319 states and 2933 transitions. Second operand 6 states. [2020-09-25 11:16:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:16:22,356 INFO L93 Difference]: Finished difference Result 6328 states and 8169 transitions. [2020-09-25 11:16:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 11:16:22,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 268 [2020-09-25 11:16:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:16:22,378 INFO L225 Difference]: With dead ends: 6328 [2020-09-25 11:16:22,379 INFO L226 Difference]: Without dead ends: 4031 [2020-09-25 11:16:22,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:16:22,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2020-09-25 11:16:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3565. [2020-09-25 11:16:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3565 states. [2020-09-25 11:16:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3565 states to 3565 states and 4535 transitions. [2020-09-25 11:16:22,509 INFO L78 Accepts]: Start accepts. Automaton has 3565 states and 4535 transitions. Word has length 268 [2020-09-25 11:16:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:16:22,510 INFO L479 AbstractCegarLoop]: Abstraction has 3565 states and 4535 transitions. [2020-09-25 11:16:22,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 11:16:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3565 states and 4535 transitions. [2020-09-25 11:16:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-09-25 11:16:22,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:16:22,527 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2020-09-25 11:16:22,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:16:22,527 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:16:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:16:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2081190627, now seen corresponding path program 1 times [2020-09-25 11:16:22,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:16:22,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269096499] [2020-09-25 11:16:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:16:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:16:22,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:22,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:22,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:22,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:16:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking...