/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:36:08,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:36:08,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:36:08,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:36:08,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:36:08,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:36:08,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:36:08,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:36:08,543 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:36:08,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:36:08,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:36:08,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:36:08,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:36:08,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:36:08,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:36:08,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:36:08,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:36:08,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:36:08,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:36:08,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:36:08,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:36:08,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:36:08,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:36:08,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:36:08,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:36:08,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:36:08,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:36:08,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:36:08,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:36:08,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:36:08,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:36:08,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:36:08,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:36:08,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:36:08,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:36:08,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:36:08,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:36:08,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:36:08,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:36:08,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:36:08,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:36:08,576 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 [2020-10-13 09:36:08,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:36:08,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:36:08,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:36:08,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:36:08,602 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:36:08,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:36:08,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:36:08,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:36:08,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:36:08,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:36:08,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:36:08,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:36:08,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:36:08,604 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:36:08,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:36:08,604 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:36:08,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:36:08,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:36:08,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:36:08,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:36:08,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:36:08,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:36:08,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:36:08,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:36:08,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:36:08,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:36:08,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:36:08,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:36:08,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:36:08,607 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 09:36:08,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:36:08,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:36:08,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:36:08,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:36:08,960 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:36:08,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label39.c [2020-10-13 09:36:09,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1effe214e/33bd56cd16724868b8a455f50a983971/FLAG51c886cb7 [2020-10-13 09:36:09,931 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:36:09,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label39.c [2020-10-13 09:36:09,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1effe214e/33bd56cd16724868b8a455f50a983971/FLAG51c886cb7 [2020-10-13 09:36:10,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1effe214e/33bd56cd16724868b8a455f50a983971 [2020-10-13 09:36:10,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:36:10,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:36:10,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:36:10,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:36:10,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:36:10,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:36:10" (1/1) ... [2020-10-13 09:36:10,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488fa6c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:10, skipping insertion in model container [2020-10-13 09:36:10,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:36:10" (1/1) ... [2020-10-13 09:36:10,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:36:10,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:36:12,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:36:12,245 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:36:12,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:36:12,774 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:36:12,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12 WrapperNode [2020-10-13 09:36:12,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:36:12,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:36:12,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:36:12,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:36:12,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:12,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:12,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:12,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:12,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:12,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:13,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (1/1) ... [2020-10-13 09:36:13,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:36:13,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:36:13,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:36:13,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:36:13,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (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 [2020-10-13 09:36:13,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:36:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:36:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:36:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:36:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:36:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:36:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:36:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:36:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:36:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:36:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:36:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:36:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:36:22,454 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:36:22,455 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:36:22,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:36:22 BoogieIcfgContainer [2020-10-13 09:36:22,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:36:22,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:36:22,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:36:22,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:36:22,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:36:10" (1/3) ... [2020-10-13 09:36:22,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53471a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:36:22, skipping insertion in model container [2020-10-13 09:36:22,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:36:12" (2/3) ... [2020-10-13 09:36:22,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53471a70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:36:22, skipping insertion in model container [2020-10-13 09:36:22,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:36:22" (3/3) ... [2020-10-13 09:36:22,481 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label39.c [2020-10-13 09:36:22,494 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:36:22,507 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:36:22,524 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:36:22,558 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:36:22,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:36:22,559 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:36:22,559 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:36:22,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:36:22,559 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:36:22,559 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:36:22,559 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:36:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-13 09:36:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 09:36:22,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:36:22,611 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] [2020-10-13 09:36:22,612 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:36:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:36:22,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1747259231, now seen corresponding path program 1 times [2020-10-13 09:36:22,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:36:22,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026925261] [2020-10-13 09:36:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:36:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:22,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:23,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:23,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 09:36:23,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:23,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 678 [2020-10-13 09:36:23,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:23,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:36:23,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:36:23,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 09:36:23,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 09:36:23,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:36:23,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:23,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:23,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:23,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:36:23,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 09:36:23,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:36:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:36:23,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:36:23,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026925261] [2020-10-13 09:36:23,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:36:23,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 09:36:23,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445018225] [2020-10-13 09:36:23,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:36:23,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:36:23,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:36:23,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:36:23,910 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 5 states. [2020-10-13 09:36:38,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:36:38,929 INFO L93 Difference]: Finished difference Result 2169 states and 4016 transitions. [2020-10-13 09:36:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:36:38,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-13 09:36:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:36:38,977 INFO L225 Difference]: With dead ends: 2169 [2020-10-13 09:36:38,977 INFO L226 Difference]: Without dead ends: 1472 [2020-10-13 09:36:38,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:36:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-10-13 09:36:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1443. [2020-10-13 09:36:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-13 09:36:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2112 transitions. [2020-10-13 09:36:39,173 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2112 transitions. Word has length 69 [2020-10-13 09:36:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:36:39,175 INFO L479 AbstractCegarLoop]: Abstraction has 1443 states and 2112 transitions. [2020-10-13 09:36:39,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:36:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2112 transitions. [2020-10-13 09:36:39,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 09:36:39,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:36:39,194 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, 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] [2020-10-13 09:36:39,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:36:39,195 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:36:39,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:36:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1044902793, now seen corresponding path program 1 times [2020-10-13 09:36:39,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:36:39,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291542118] [2020-10-13 09:36:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:36:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:39,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:42,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:42,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:42,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 09:36:42,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:36:42,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3291 [2020-10-13 09:36:42,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:42,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 09:36:42,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-13 09:36:42,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 09:36:42,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 09:36:43,020 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-13 09:36:43,153 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-10-13 09:36:43,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:36:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:43,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:43,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:43,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:36:43,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:43,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 09:36:43,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:43,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:36:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:36:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:36:43,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:36:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:43,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:43,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:43,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 09:36:43,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-13 09:36:43,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:36:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 09:36:43,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:36:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:36:43,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291542118] [2020-10-13 09:36:43,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:36:43,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 09:36:43,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202013102] [2020-10-13 09:36:43,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 09:36:43,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:36:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 09:36:43,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:36:43,698 INFO L87 Difference]: Start difference. First operand 1443 states and 2112 transitions. Second operand 8 states. [2020-10-13 09:36:44,930 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-13 09:36:45,115 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-13 09:36:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:36:57,225 INFO L93 Difference]: Finished difference Result 2602 states and 3840 transitions. [2020-10-13 09:36:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 09:36:57,226 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2020-10-13 09:36:57,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:36:57,237 INFO L225 Difference]: With dead ends: 2602 [2020-10-13 09:36:57,238 INFO L226 Difference]: Without dead ends: 1452 [2020-10-13 09:36:57,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-13 09:36:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2020-10-13 09:36:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1443. [2020-10-13 09:36:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-13 09:36:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 2009 transitions. [2020-10-13 09:36:57,294 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 2009 transitions. Word has length 140 [2020-10-13 09:36:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:36:57,295 INFO L479 AbstractCegarLoop]: Abstraction has 1443 states and 2009 transitions. [2020-10-13 09:36:57,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 09:36:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 2009 transitions. [2020-10-13 09:36:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 09:36:57,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:36:57,299 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, 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] [2020-10-13 09:36:57,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:36:57,299 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:36:57,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:36:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1036271817, now seen corresponding path program 1 times [2020-10-13 09:36:57,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:36:57,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191230570] [2020-10-13 09:36:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:36:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:57,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:57,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:58,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:01,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:01,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-13 09:37:01,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:37:01,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4109 [2020-10-13 09:37:01,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:01,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 09:37:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-13 09:37:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 09:37:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:01,885 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-13 09:37:02,008 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-10-13 09:37:02,218 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-10-13 09:37:02,512 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2020-10-13 09:37:02,716 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2020-10-13 09:37:02,898 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-13 09:37:03,125 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-13 09:37:03,333 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-13 09:37:03,579 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-13 09:37:03,789 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-13 09:37:03,937 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2020-10-13 09:37:04,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:37:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:04,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:04,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:37:04,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:04,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:37:04,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:04,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:37:04,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:04,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:37:04,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:37:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:04,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:04,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:04,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 09:37:04,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:04,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-13 09:37:04,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:04,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:37:04,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:04,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 09:37:04,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:37:04,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191230570] [2020-10-13 09:37:04,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:37:04,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 09:37:04,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080447225] [2020-10-13 09:37:04,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 09:37:04,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:37:04,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 09:37:04,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2020-10-13 09:37:04,621 INFO L87 Difference]: Start difference. First operand 1443 states and 2009 transitions. Second operand 20 states. [2020-10-13 09:37:06,569 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-13 09:37:06,942 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-13 09:37:20,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:37:20,714 INFO L93 Difference]: Finished difference Result 2781 states and 3863 transitions. [2020-10-13 09:37:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 09:37:20,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 143 [2020-10-13 09:37:20,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:37:20,735 INFO L225 Difference]: With dead ends: 2781 [2020-10-13 09:37:20,735 INFO L226 Difference]: Without dead ends: 1452 [2020-10-13 09:37:20,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 09:37:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2020-10-13 09:37:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1443. [2020-10-13 09:37:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-13 09:37:20,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1950 transitions. [2020-10-13 09:37:20,797 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1950 transitions. Word has length 143 [2020-10-13 09:37:20,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:37:20,798 INFO L479 AbstractCegarLoop]: Abstraction has 1443 states and 1950 transitions. [2020-10-13 09:37:20,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 09:37:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1950 transitions. [2020-10-13 09:37:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 09:37:20,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:37:20,801 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, 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] [2020-10-13 09:37:20,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:37:20,801 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:37:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:37:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1049089677, now seen corresponding path program 1 times [2020-10-13 09:37:20,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:37:20,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983850594] [2020-10-13 09:37:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:37:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:20,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:21,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:21,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:23,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:23,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 09:37:23,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:37:23,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2587 [2020-10-13 09:37:23,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:23,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 09:37:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 09:37:23,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 09:37:23,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:23,848 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-13 09:37:24,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:37:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:24,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:24,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:24,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:37:24,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:24,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:37:24,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:24,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:37:24,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:24,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:37:24,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:24,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:37:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:24,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:24,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:24,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 09:37:24,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:24,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 09:37:24,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:24,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:37:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 09:37:24,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:37:24,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983850594] [2020-10-13 09:37:24,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:37:24,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 09:37:24,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222908513] [2020-10-13 09:37:24,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 09:37:24,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:37:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 09:37:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 09:37:24,462 INFO L87 Difference]: Start difference. First operand 1443 states and 1950 transitions. Second operand 11 states. [2020-10-13 09:37:25,695 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 09:37:25,884 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-10-13 09:37:26,322 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-13 09:37:26,525 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-13 09:37:26,755 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2020-10-13 09:37:38,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:37:38,899 INFO L93 Difference]: Finished difference Result 2506 states and 3434 transitions. [2020-10-13 09:37:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 09:37:38,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 145 [2020-10-13 09:37:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:37:38,911 INFO L225 Difference]: With dead ends: 2506 [2020-10-13 09:37:38,911 INFO L226 Difference]: Without dead ends: 1452 [2020-10-13 09:37:38,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-10-13 09:37:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2020-10-13 09:37:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1443. [2020-10-13 09:37:38,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-13 09:37:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1947 transitions. [2020-10-13 09:37:38,963 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1947 transitions. Word has length 145 [2020-10-13 09:37:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:37:38,964 INFO L479 AbstractCegarLoop]: Abstraction has 1443 states and 1947 transitions. [2020-10-13 09:37:38,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 09:37:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1947 transitions. [2020-10-13 09:37:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-13 09:37:38,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:37:38,967 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, 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] [2020-10-13 09:37:38,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 09:37:38,968 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:37:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:37:38,968 INFO L82 PathProgramCache]: Analyzing trace with hash -192491641, now seen corresponding path program 1 times [2020-10-13 09:37:38,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:37:38,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435305172] [2020-10-13 09:37:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:37:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:39,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:39,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:39,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:40,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:40,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 09:37:40,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:37:40,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1464 [2020-10-13 09:37:40,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:37:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 09:37:40,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 09:37:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:40,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:37:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:40,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:40,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:37:40,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:40,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:37:40,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:40,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:37:40,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:37:40,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:37:40,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:37:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:40,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:40,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:40,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 09:37:40,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:40,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 09:37:40,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:37:40,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:40,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 09:37:40,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:37:40,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435305172] [2020-10-13 09:37:40,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:37:40,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:37:40,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039127170] [2020-10-13 09:37:40,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:37:40,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:37:40,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:37:40,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:37:40,929 INFO L87 Difference]: Start difference. First operand 1443 states and 1947 transitions. Second operand 5 states. [2020-10-13 09:37:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:37:51,088 INFO L93 Difference]: Finished difference Result 2495 states and 3418 transitions. [2020-10-13 09:37:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:37:51,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-13 09:37:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:37:51,100 INFO L225 Difference]: With dead ends: 2495 [2020-10-13 09:37:51,101 INFO L226 Difference]: Without dead ends: 1452 [2020-10-13 09:37:51,105 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 [2020-10-13 09:37:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2020-10-13 09:37:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1443. [2020-10-13 09:37:51,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1443 states. [2020-10-13 09:37:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1944 transitions. [2020-10-13 09:37:51,152 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1944 transitions. Word has length 148 [2020-10-13 09:37:51,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:37:51,153 INFO L479 AbstractCegarLoop]: Abstraction has 1443 states and 1944 transitions. [2020-10-13 09:37:51,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:37:51,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1944 transitions. [2020-10-13 09:37:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 09:37:51,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:37:51,156 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, 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] [2020-10-13 09:37:51,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 09:37:51,156 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:37:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:37:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1779459607, now seen corresponding path program 1 times [2020-10-13 09:37:51,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:37:51,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761404235] [2020-10-13 09:37:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:37:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:51,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:51,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:51,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 09:37:51,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-13 09:37:51,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:37:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-13 09:37:51,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 09:37:51,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:37:51,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:37:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:51,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:51,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:51,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:37:51,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:51,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:37:51,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:37:51,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:51,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:37:51,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:37:51,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:37:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:51,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:51,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:51,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:37:51,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:51,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-13 09:37:51,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:37:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:51,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 09:37:51,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:37:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:37:51,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761404235] [2020-10-13 09:37:51,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:37:51,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:37:51,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80822149] [2020-10-13 09:37:51,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:37:51,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:37:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:37:51,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:37:51,927 INFO L87 Difference]: Start difference. First operand 1443 states and 1944 transitions. Second operand 6 states. [2020-10-13 09:38:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:38:05,228 INFO L93 Difference]: Finished difference Result 3777 states and 5177 transitions. [2020-10-13 09:38:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:38:05,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2020-10-13 09:38:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:38:05,245 INFO L225 Difference]: With dead ends: 3777 [2020-10-13 09:38:05,245 INFO L226 Difference]: Without dead ends: 2781 [2020-10-13 09:38:05,250 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 [2020-10-13 09:38:05,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2020-10-13 09:38:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2777. [2020-10-13 09:38:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2777 states. [2020-10-13 09:38:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3731 transitions. [2020-10-13 09:38:05,324 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3731 transitions. Word has length 156 [2020-10-13 09:38:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:38:05,325 INFO L479 AbstractCegarLoop]: Abstraction has 2777 states and 3731 transitions. [2020-10-13 09:38:05,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:38:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3731 transitions. [2020-10-13 09:38:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 09:38:05,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:05,328 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, 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] [2020-10-13 09:38:05,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 09:38:05,329 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:05,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 786833419, now seen corresponding path program 1 times [2020-10-13 09:38:05,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:05,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888892071] [2020-10-13 09:38:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:05,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:05,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:06,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:06,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 09:38:06,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:38:06,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 781 [2020-10-13 09:38:06,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:38:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 09:38:06,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 09:38:06,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:06,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:06,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:06,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:06,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:06,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:06,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:38:06,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:06,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:38:06,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:06,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:38:06,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:06,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:38:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:06,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:06,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:06,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 09:38:06,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-13 09:38:06,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:06,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 09:38:06,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:38:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:06,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888892071] [2020-10-13 09:38:06,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:38:06,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:38:06,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101765166] [2020-10-13 09:38:06,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:38:06,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:38:06,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:38:06,505 INFO L87 Difference]: Start difference. First operand 2777 states and 3731 transitions. Second operand 5 states. [2020-10-13 09:38:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:38:23,184 INFO L93 Difference]: Finished difference Result 6003 states and 8417 transitions. [2020-10-13 09:38:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:38:23,186 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-13 09:38:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:38:23,204 INFO L225 Difference]: With dead ends: 6003 [2020-10-13 09:38:23,204 INFO L226 Difference]: Without dead ends: 4117 [2020-10-13 09:38:23,209 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 [2020-10-13 09:38:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2020-10-13 09:38:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 4110. [2020-10-13 09:38:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4110 states. [2020-10-13 09:38:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 5253 transitions. [2020-10-13 09:38:23,295 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 5253 transitions. Word has length 166 [2020-10-13 09:38:23,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:38:23,296 INFO L479 AbstractCegarLoop]: Abstraction has 4110 states and 5253 transitions. [2020-10-13 09:38:23,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:38:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 5253 transitions. [2020-10-13 09:38:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 09:38:23,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:23,299 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, 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] [2020-10-13 09:38:23,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 09:38:23,300 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:23,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:23,300 INFO L82 PathProgramCache]: Analyzing trace with hash 43061278, now seen corresponding path program 1 times [2020-10-13 09:38:23,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:23,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416945996] [2020-10-13 09:38:23,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:23,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:23,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:26,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:26,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 09:38:26,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:38:26,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2687 [2020-10-13 09:38:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 09:38:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 09:38:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 09:38:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:26,310 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-10-13 09:38:26,459 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-13 09:38:26,663 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-13 09:38:26,825 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2020-10-13 09:38:26,972 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-10-13 09:38:27,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:27,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:27,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:27,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:27,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:27,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:38:27,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:38:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:27,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:38:27,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:27,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:38:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:27,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:27,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:27,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 09:38:27,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:27,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 09:38:27,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:27,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:27,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 09:38:27,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:27,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416945996] [2020-10-13 09:38:27,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:38:27,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 09:38:27,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886947637] [2020-10-13 09:38:27,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 09:38:27,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 09:38:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 09:38:27,423 INFO L87 Difference]: Start difference. First operand 4110 states and 5253 transitions. Second operand 11 states. [2020-10-13 09:38:29,642 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-10-13 09:38:29,892 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-10-13 09:38:30,642 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 09:38:30,966 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-13 09:38:31,356 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-13 09:38:31,537 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-13 09:38:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:38:48,729 INFO L93 Difference]: Finished difference Result 7391 states and 9503 transitions. [2020-10-13 09:38:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 09:38:48,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 172 [2020-10-13 09:38:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:38:48,750 INFO L225 Difference]: With dead ends: 7391 [2020-10-13 09:38:48,751 INFO L226 Difference]: Without dead ends: 4114 [2020-10-13 09:38:48,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-10-13 09:38:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2020-10-13 09:38:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 4110. [2020-10-13 09:38:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4110 states. [2020-10-13 09:38:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 5247 transitions. [2020-10-13 09:38:48,840 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 5247 transitions. Word has length 172 [2020-10-13 09:38:48,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:38:48,840 INFO L479 AbstractCegarLoop]: Abstraction has 4110 states and 5247 transitions. [2020-10-13 09:38:48,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 09:38:48,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 5247 transitions. [2020-10-13 09:38:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 09:38:48,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:38:48,844 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, 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] [2020-10-13 09:38:48,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 09:38:48,844 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:38:48,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:38:48,845 INFO L82 PathProgramCache]: Analyzing trace with hash -548871215, now seen corresponding path program 1 times [2020-10-13 09:38:48,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:38:48,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775184508] [2020-10-13 09:38:48,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:38:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:48,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:48,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:50,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:50,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 09:38:50,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:38:50,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1567 [2020-10-13 09:38:50,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:50,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:38:50,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-13 09:38:50,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 09:38:50,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:50,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:38:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:50,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:50,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:38:50,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:50,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:38:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:38:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:38:50,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:38:50,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 09:38:50,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:38:50,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-13 09:38:50,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:38:50,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:38:50,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:38:50,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-13 09:38:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:38:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:38:50,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775184508] [2020-10-13 09:38:50,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:38:50,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:38:50,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668588622] [2020-10-13 09:38:50,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:38:50,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:38:50,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:38:50,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:38:50,880 INFO L87 Difference]: Start difference. First operand 4110 states and 5247 transitions. Second operand 5 states. [2020-10-13 09:39:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:01,721 INFO L93 Difference]: Finished difference Result 7363 states and 9465 transitions. [2020-10-13 09:39:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:01,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 197 [2020-10-13 09:39:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:01,741 INFO L225 Difference]: With dead ends: 7363 [2020-10-13 09:39:01,741 INFO L226 Difference]: Without dead ends: 4114 [2020-10-13 09:39:01,748 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 [2020-10-13 09:39:01,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2020-10-13 09:39:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 4110. [2020-10-13 09:39:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4110 states. [2020-10-13 09:39:01,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4110 states to 4110 states and 5241 transitions. [2020-10-13 09:39:01,834 INFO L78 Accepts]: Start accepts. Automaton has 4110 states and 5241 transitions. Word has length 197 [2020-10-13 09:39:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:01,835 INFO L479 AbstractCegarLoop]: Abstraction has 4110 states and 5241 transitions. [2020-10-13 09:39:01,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:39:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4110 states and 5241 transitions. [2020-10-13 09:39:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-13 09:39:01,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:01,839 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, 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, 1, 1, 1, 1, 1] [2020-10-13 09:39:01,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 09:39:01,840 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:01,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:01,840 INFO L82 PathProgramCache]: Analyzing trace with hash -925979528, now seen corresponding path program 1 times [2020-10-13 09:39:01,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:01,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244362491] [2020-10-13 09:39:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:01,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:02,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:02,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:02,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:02,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:04,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:04,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-13 09:39:04,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 09:39:04,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2338 [2020-10-13 09:39:04,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:04,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 09:39:04,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 152 [2020-10-13 09:39:04,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 09:39:04,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:04,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:04,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:04,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:04,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:04,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:04,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:39:04,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:04,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:04,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:04,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:04,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 09:39:04,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:04,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-13 09:39:04,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 09:39:04,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-13 09:39:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:04,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244362491] [2020-10-13 09:39:04,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:04,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:39:04,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168038091] [2020-10-13 09:39:04,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:39:04,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:39:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:04,749 INFO L87 Difference]: Start difference. First operand 4110 states and 5241 transitions. Second operand 6 states. [2020-10-13 09:39:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:35,579 INFO L93 Difference]: Finished difference Result 10921 states and 14302 transitions. [2020-10-13 09:39:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 09:39:35,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 213 [2020-10-13 09:39:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:35,610 INFO L225 Difference]: With dead ends: 10921 [2020-10-13 09:39:35,610 INFO L226 Difference]: Without dead ends: 6761 [2020-10-13 09:39:35,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:39:35,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2020-10-13 09:39:35,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 5452. [2020-10-13 09:39:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5452 states. [2020-10-13 09:39:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 6840 transitions. [2020-10-13 09:39:35,751 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 6840 transitions. Word has length 213 [2020-10-13 09:39:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:35,752 INFO L479 AbstractCegarLoop]: Abstraction has 5452 states and 6840 transitions. [2020-10-13 09:39:35,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:39:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 6840 transitions. [2020-10-13 09:39:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-13 09:39:35,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:35,757 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 09:39:35,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 09:39:35,758 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:35,759 INFO L82 PathProgramCache]: Analyzing trace with hash -281548870, now seen corresponding path program 1 times [2020-10-13 09:39:35,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:35,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071529176] [2020-10-13 09:39:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:35,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:35,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:37,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:37,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:37,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-13 09:39:37,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:39:37,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1706 [2020-10-13 09:39:37,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:37,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-10-13 09:39:37,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 09:39:37,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:37,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:37,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:37,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:37,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:37,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:37,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:37,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:37,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 09:39:37,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:37,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 09:39:37,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:37,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-13 09:39:37,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 61 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:39:37,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071529176] [2020-10-13 09:39:37,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:37,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:39:38,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107491931] [2020-10-13 09:39:38,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:39:38,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:38,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:39:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:38,006 INFO L87 Difference]: Start difference. First operand 5452 states and 6840 transitions. Second operand 5 states. [2020-10-13 09:39:49,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:39:49,306 INFO L93 Difference]: Finished difference Result 9599 states and 12153 transitions. [2020-10-13 09:39:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:39:49,315 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-13 09:39:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:39:49,336 INFO L225 Difference]: With dead ends: 9599 [2020-10-13 09:39:49,336 INFO L226 Difference]: Without dead ends: 5456 [2020-10-13 09:39:49,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:39:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5456 states. [2020-10-13 09:39:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5456 to 5452. [2020-10-13 09:39:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5452 states. [2020-10-13 09:39:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5452 states to 5452 states and 6831 transitions. [2020-10-13 09:39:49,435 INFO L78 Accepts]: Start accepts. Automaton has 5452 states and 6831 transitions. Word has length 223 [2020-10-13 09:39:49,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:39:49,435 INFO L479 AbstractCegarLoop]: Abstraction has 5452 states and 6831 transitions. [2020-10-13 09:39:49,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:39:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5452 states and 6831 transitions. [2020-10-13 09:39:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 09:39:49,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:39:49,441 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 09:39:49,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 09:39:49,441 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:39:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:39:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash 728269513, now seen corresponding path program 1 times [2020-10-13 09:39:49,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:39:49,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346331336] [2020-10-13 09:39:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:39:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:49,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:50,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:54,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:54,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-13 09:39:54,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:39:54,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4611 [2020-10-13 09:39:54,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:54,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:39:54,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-13 09:39:54,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 09:39:54,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:54,296 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2020-10-13 09:39:54,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:39:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:54,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:54,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:54,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:39:54,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:54,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:39:54,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:54,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:54,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:39:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:54,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:54,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:54,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:39:54,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:54,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 09:39:54,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:39:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:54,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:39:54,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:54,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:39:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:39:54,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:39:54,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:39:54,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:39:54,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:39:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 09:39:54,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346331336] [2020-10-13 09:39:54,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:39:54,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:39:54,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704201382] [2020-10-13 09:39:54,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:39:54,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:39:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:39:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:39:54,608 INFO L87 Difference]: Start difference. First operand 5452 states and 6831 transitions. Second operand 5 states.