/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_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 09:34:08,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 09:34:08,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 09:34:08,604 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 09:34:08,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 09:34:08,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 09:34:08,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 09:34:08,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 09:34:08,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 09:34:08,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 09:34:08,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 09:34:08,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 09:34:08,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 09:34:08,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 09:34:08,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 09:34:08,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 09:34:08,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 09:34:08,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 09:34:08,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 09:34:08,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 09:34:08,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 09:34:08,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 09:34:08,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 09:34:08,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 09:34:08,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 09:34:08,641 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 09:34:08,641 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 09:34:08,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 09:34:08,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 09:34:08,644 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 09:34:08,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 09:34:08,645 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 09:34:08,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 09:34:08,647 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 09:34:08,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 09:34:08,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 09:34:08,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 09:34:08,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 09:34:08,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 09:34:08,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 09:34:08,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 09:34:08,653 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 09:34:08,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 09:34:08,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 09:34:08,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 09:34:08,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 09:34:08,681 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 09:34:08,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 09:34:08,682 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 09:34:08,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 09:34:08,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 09:34:08,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 09:34:08,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 09:34:08,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 09:34:08,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 09:34:08,683 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 09:34:08,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 09:34:08,683 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 09:34:08,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 09:34:08,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 09:34:08,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 09:34:08,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 09:34:08,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 09:34:08,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 09:34:08,685 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 09:34:08,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 09:34:08,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 09:34:08,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 09:34:08,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 09:34:08,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 09:34:08,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 09:34:08,686 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 09:34:09,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 09:34:09,045 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 09:34:09,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 09:34:09,053 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 09:34:09,055 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 09:34:09,056 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label30.c [2020-10-13 09:34:09,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3016aa7e/0a43b13381354cc39d1874a68cb81733/FLAG809225bb7 [2020-10-13 09:34:09,961 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 09:34:09,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label30.c [2020-10-13 09:34:09,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3016aa7e/0a43b13381354cc39d1874a68cb81733/FLAG809225bb7 [2020-10-13 09:34:10,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e3016aa7e/0a43b13381354cc39d1874a68cb81733 [2020-10-13 09:34:10,083 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 09:34:10,085 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 09:34:10,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 09:34:10,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 09:34:10,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 09:34:10,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:34:10" (1/1) ... [2020-10-13 09:34:10,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425b51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:10, skipping insertion in model container [2020-10-13 09:34:10,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:34:10" (1/1) ... [2020-10-13 09:34:10,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 09:34:10,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 09:34:11,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:34:11,546 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 09:34:12,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 09:34:12,058 INFO L208 MainTranslator]: Completed translation [2020-10-13 09:34:12,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12 WrapperNode [2020-10-13 09:34:12,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 09:34:12,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 09:34:12,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 09:34:12,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 09:34:12,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (1/1) ... [2020-10-13 09:34:12,411 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 09:34:12,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 09:34:12,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 09:34:12,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 09:34:12,415 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (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 09:34:12,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 09:34:12,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 09:34:12,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 09:34:12,526 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 09:34:12,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 09:34:12,528 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 09:34:12,529 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 09:34:12,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 09:34:12,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 09:34:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 09:34:12,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 09:34:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 09:34:12,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 09:34:21,505 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 09:34:21,505 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 09:34:21,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:34:21 BoogieIcfgContainer [2020-10-13 09:34:21,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 09:34:21,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 09:34:21,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 09:34:21,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 09:34:21,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:34:10" (1/3) ... [2020-10-13 09:34:21,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1588a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:34:21, skipping insertion in model container [2020-10-13 09:34:21,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:34:12" (2/3) ... [2020-10-13 09:34:21,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a1588a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:34:21, skipping insertion in model container [2020-10-13 09:34:21,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:34:21" (3/3) ... [2020-10-13 09:34:21,527 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label30.c [2020-10-13 09:34:21,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 09:34:21,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 09:34:21,567 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 09:34:21,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 09:34:21,600 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 09:34:21,600 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 09:34:21,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 09:34:21,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 09:34:21,601 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 09:34:21,601 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 09:34:21,601 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 09:34:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2020-10-13 09:34:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 09:34:21,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:34:21,647 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] [2020-10-13 09:34:21,648 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:34:21,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:34:21,656 INFO L82 PathProgramCache]: Analyzing trace with hash 993587001, now seen corresponding path program 1 times [2020-10-13 09:34:21,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:34:21,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055165156] [2020-10-13 09:34:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:34:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:22,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:22,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 09:34:22,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:22,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-13 09:34:22,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:34:22,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:34:22,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 09:34:22,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 09:34:22,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:34:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:22,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:22,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:22,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:34:22,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:22,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 09:34:22,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:22,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:34:22,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:22,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:34:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:22,655 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 09:34:22,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055165156] [2020-10-13 09:34:22,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:34:22,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 09:34:22,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991775080] [2020-10-13 09:34:22,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 09:34:22,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:34:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 09:34:22,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 09:34:22,693 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2020-10-13 09:34:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:34:36,263 INFO L93 Difference]: Finished difference Result 1716 states and 3126 transitions. [2020-10-13 09:34:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:34:36,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-13 09:34:36,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:34:36,290 INFO L225 Difference]: With dead ends: 1716 [2020-10-13 09:34:36,290 INFO L226 Difference]: Without dead ends: 1034 [2020-10-13 09:34:36,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:34:36,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2020-10-13 09:34:36,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1008. [2020-10-13 09:34:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1008 states. [2020-10-13 09:34:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1705 transitions. [2020-10-13 09:34:36,417 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1705 transitions. Word has length 30 [2020-10-13 09:34:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:34:36,418 INFO L479 AbstractCegarLoop]: Abstraction has 1008 states and 1705 transitions. [2020-10-13 09:34:36,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 09:34:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1705 transitions. [2020-10-13 09:34:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 09:34:36,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:34:36,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:34:36,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 09:34:36,424 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:34:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:34:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1482684936, now seen corresponding path program 1 times [2020-10-13 09:34:36,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:34:36,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197819128] [2020-10-13 09:34:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:34:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:37,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:37,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 09:34:37,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:34:37,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-13 09:34:37,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:34:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 09:34:37,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:34:37,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:34:37,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:34:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:37,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:37,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:34:37,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:37,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 09:34:37,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:34:37,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:37,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:34:37,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:34:37,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:34:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:37,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:37,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:37,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 09:34:37,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:37,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-13 09:34:37,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:34:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:37,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 09:34:37,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:34:37,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197819128] [2020-10-13 09:34:37,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:34:37,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 09:34:37,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192194211] [2020-10-13 09:34:37,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 09:34:37,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:34:37,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 09:34:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:34:37,829 INFO L87 Difference]: Start difference. First operand 1008 states and 1705 transitions. Second operand 6 states. [2020-10-13 09:34:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:34:55,562 INFO L93 Difference]: Finished difference Result 2906 states and 4992 transitions. [2020-10-13 09:34:55,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:34:55,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-13 09:34:55,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:34:55,578 INFO L225 Difference]: With dead ends: 2906 [2020-10-13 09:34:55,578 INFO L226 Difference]: Without dead ends: 1904 [2020-10-13 09:34:55,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 09:34:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-13 09:34:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1889. [2020-10-13 09:34:55,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1889 states. [2020-10-13 09:34:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 3225 transitions. [2020-10-13 09:34:55,668 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 3225 transitions. Word has length 99 [2020-10-13 09:34:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:34:55,671 INFO L479 AbstractCegarLoop]: Abstraction has 1889 states and 3225 transitions. [2020-10-13 09:34:55,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 09:34:55,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 3225 transitions. [2020-10-13 09:34:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 09:34:55,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:34:55,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:34:55,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 09:34:55,683 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:34:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:34:55,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1852913540, now seen corresponding path program 1 times [2020-10-13 09:34:55,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:34:55,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772862180] [2020-10-13 09:34:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:34:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:55,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:55,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:57,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:57,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 09:34:57,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:34:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-13 09:34:57,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:57,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:34:57,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-13 09:34:57,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 09:34:57,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:34:57,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:34:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:57,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:57,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:57,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:34:57,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:57,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:34:57,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:57,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:34:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:57,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:34:57,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:34:57,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:34:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:34:57,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:34:57,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:34:57,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 09:34:57,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:34:57,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-13 09:34:57,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:34:57,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:34:57,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:34:57,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 09:34:57,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:34:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:34:57,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772862180] [2020-10-13 09:34:57,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:34:57,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:34:57,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205506930] [2020-10-13 09:34:57,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:34:57,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:34:57,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:34:57,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:34:57,857 INFO L87 Difference]: Start difference. First operand 1889 states and 3225 transitions. Second operand 5 states. [2020-10-13 09:35:05,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:35:05,618 INFO L93 Difference]: Finished difference Result 3802 states and 6502 transitions. [2020-10-13 09:35:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:35:05,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-10-13 09:35:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:35:05,640 INFO L225 Difference]: With dead ends: 3802 [2020-10-13 09:35:05,641 INFO L226 Difference]: Without dead ends: 1903 [2020-10-13 09:35:05,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 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 09:35:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2020-10-13 09:35:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1889. [2020-10-13 09:35:05,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1889 states. [2020-10-13 09:35:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 3221 transitions. [2020-10-13 09:35:05,711 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 3221 transitions. Word has length 105 [2020-10-13 09:35:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:35:05,713 INFO L479 AbstractCegarLoop]: Abstraction has 1889 states and 3221 transitions. [2020-10-13 09:35:05,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:35:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 3221 transitions. [2020-10-13 09:35:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 09:35:05,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:35:05,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:35:05,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 09:35:05,718 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:35:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:35:05,719 INFO L82 PathProgramCache]: Analyzing trace with hash -771762316, now seen corresponding path program 1 times [2020-10-13 09:35:05,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:35:05,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108656481] [2020-10-13 09:35:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:35:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:05,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:06,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:06,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:06,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 09:35:06,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:35:06,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 759 [2020-10-13 09:35:06,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:06,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:35:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 09:35:06,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:35:06,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:06,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:35:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:06,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:06,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:06,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:35:06,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:35:06,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:35:06,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:35:06,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:35:06,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:35:06,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:06,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:35:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:06,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:06,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:06,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 09:35:06,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:35:06,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 09:35:06,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:06,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:35:06,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:35:06,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 09:35:06,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:35:06,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108656481] [2020-10-13 09:35:06,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:35:06,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:35:06,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084364628] [2020-10-13 09:35:06,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:35:06,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:35:06,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:35:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:35:06,906 INFO L87 Difference]: Start difference. First operand 1889 states and 3221 transitions. Second operand 5 states. [2020-10-13 09:35:25,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:35:25,433 INFO L93 Difference]: Finished difference Result 5578 states and 9671 transitions. [2020-10-13 09:35:25,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:35:25,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-13 09:35:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:35:25,457 INFO L225 Difference]: With dead ends: 5578 [2020-10-13 09:35:25,457 INFO L226 Difference]: Without dead ends: 3695 [2020-10-13 09:35:25,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:35:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2020-10-13 09:35:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3677. [2020-10-13 09:35:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3677 states. [2020-10-13 09:35:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 6135 transitions. [2020-10-13 09:35:25,580 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 6135 transitions. Word has length 109 [2020-10-13 09:35:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:35:25,581 INFO L479 AbstractCegarLoop]: Abstraction has 3677 states and 6135 transitions. [2020-10-13 09:35:25,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:35:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 6135 transitions. [2020-10-13 09:35:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 09:35:25,583 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:35:25,584 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:35:25,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 09:35:25,584 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:35:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:35:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1656132815, now seen corresponding path program 1 times [2020-10-13 09:35:25,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:35:25,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263333287] [2020-10-13 09:35:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:35:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:25,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:25,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:25,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:26,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:29,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:29,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 09:35:29,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:35:29,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3642 [2020-10-13 09:35:29,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:35:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 96 [2020-10-13 09:35:29,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:35:29,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:29,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:35:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:29,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:29,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:35:29,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:35:29,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:35:29,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:29,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:35:29,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:35:29,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:35:29,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:29,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:35:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:29,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:29,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:29,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 09:35:29,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:35:29,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-13 09:35:29,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:35:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:35:29,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 09:35:29,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:35:29,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263333287] [2020-10-13 09:35:29,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:35:29,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:35:29,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92338435] [2020-10-13 09:35:29,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:35:29,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:35:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:35:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:35:29,553 INFO L87 Difference]: Start difference. First operand 3677 states and 6135 transitions. Second operand 5 states. [2020-10-13 09:35:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:35:51,567 INFO L93 Difference]: Finished difference Result 10925 states and 18460 transitions. [2020-10-13 09:35:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:35:51,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-13 09:35:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:35:51,607 INFO L225 Difference]: With dead ends: 10925 [2020-10-13 09:35:51,607 INFO L226 Difference]: Without dead ends: 7254 [2020-10-13 09:35:51,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:35:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7254 states. [2020-10-13 09:35:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 5492. [2020-10-13 09:35:51,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5492 states. [2020-10-13 09:35:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 9096 transitions. [2020-10-13 09:35:51,801 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 9096 transitions. Word has length 116 [2020-10-13 09:35:51,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:35:51,802 INFO L479 AbstractCegarLoop]: Abstraction has 5492 states and 9096 transitions. [2020-10-13 09:35:51,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:35:51,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 9096 transitions. [2020-10-13 09:35:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 09:35:51,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:35:51,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:35:51,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 09:35:51,805 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:35:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:35:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1479909619, now seen corresponding path program 1 times [2020-10-13 09:35:51,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:35:51,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009177454] [2020-10-13 09:35:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:35:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:52,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:52,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:52,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:52,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 09:35:52,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 09:35:52,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1008 [2020-10-13 09:35:52,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:52,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:35:52,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 09:35:52,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 09:35:52,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:52,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:35:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:52,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:52,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:52,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:35:52,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:35:52,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 09:35:52,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:52,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:35:52,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:35:52,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:35:52,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:52,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:35:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:35:53,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:35:53,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:35:53,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 09:35:53,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:35:53,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-10-13 09:35:53,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:35:53,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:35:53,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:35:53,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 09:35:53,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:35:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:35:53,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009177454] [2020-10-13 09:35:53,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:35:53,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:35:53,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295280484] [2020-10-13 09:35:53,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:35:53,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:35:53,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:35:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:35:53,144 INFO L87 Difference]: Start difference. First operand 5492 states and 9096 transitions. Second operand 5 states. [2020-10-13 09:36:06,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:36:06,484 INFO L93 Difference]: Finished difference Result 11098 states and 18412 transitions. [2020-10-13 09:36:06,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:36:06,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2020-10-13 09:36:06,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:36:06,513 INFO L225 Difference]: With dead ends: 11098 [2020-10-13 09:36:06,514 INFO L226 Difference]: Without dead ends: 5516 [2020-10-13 09:36:06,530 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 09:36:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2020-10-13 09:36:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 5492. [2020-10-13 09:36:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5492 states. [2020-10-13 09:36:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 9084 transitions. [2020-10-13 09:36:06,671 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 9084 transitions. Word has length 118 [2020-10-13 09:36:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:36:06,671 INFO L479 AbstractCegarLoop]: Abstraction has 5492 states and 9084 transitions. [2020-10-13 09:36:06,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:36:06,672 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 9084 transitions. [2020-10-13 09:36:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 09:36:06,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:36:06,674 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:06,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 09:36:06,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:36:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:36:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1685860667, now seen corresponding path program 1 times [2020-10-13 09:36:06,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:36:06,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065103054] [2020-10-13 09:36:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:36:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:06,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:06,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:07,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:07,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 09:36:07,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:36:07,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-13 09:36:07,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:07,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:36:07,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 102 [2020-10-13 09:36:07,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:36:07,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:07,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:36:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:07,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:07,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:07,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:36:07,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:07,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:36:07,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:07,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:36:07,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:07,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:36:07,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:07,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:36:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:07,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 09:36:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-13 09:36:07,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:36:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 09:36:07,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:36:07,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065103054] [2020-10-13 09:36:07,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:36:07,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:36:07,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246739550] [2020-10-13 09:36:07,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:36:07,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:36:07,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:36:07,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:36:07,740 INFO L87 Difference]: Start difference. First operand 5492 states and 9084 transitions. Second operand 5 states. [2020-10-13 09:36:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:36:34,768 INFO L93 Difference]: Finished difference Result 16265 states and 27489 transitions. [2020-10-13 09:36:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:36:34,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-13 09:36:34,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:36:34,821 INFO L225 Difference]: With dead ends: 16265 [2020-10-13 09:36:34,821 INFO L226 Difference]: Without dead ends: 10779 [2020-10-13 09:36:34,836 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 09:36:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10779 states. [2020-10-13 09:36:35,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10779 to 9019. [2020-10-13 09:36:35,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9019 states. [2020-10-13 09:36:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9019 states to 9019 states and 13495 transitions. [2020-10-13 09:36:35,065 INFO L78 Accepts]: Start accepts. Automaton has 9019 states and 13495 transitions. Word has length 122 [2020-10-13 09:36:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:36:35,066 INFO L479 AbstractCegarLoop]: Abstraction has 9019 states and 13495 transitions. [2020-10-13 09:36:35,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:36:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 9019 states and 13495 transitions. [2020-10-13 09:36:35,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 09:36:35,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:36:35,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:35,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 09:36:35,070 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:36:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:36:35,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1268495056, now seen corresponding path program 1 times [2020-10-13 09:36:35,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:36:35,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531394972] [2020-10-13 09:36:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:36:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:35,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:35,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:35,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 09:36:35,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 09:36:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 675 [2020-10-13 09:36:35,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:36:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-13 09:36:35,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 09:36:35,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:35,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:36:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:35,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:35,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:35,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:36:35,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:35,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:36:35,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:36:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:35,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:36:35,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:35,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:36:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:35,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:36,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:36,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 09:36:36,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:36,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-13 09:36:36,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:36,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:36:36,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:36,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 09:36:36,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 09:36:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:36:36,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531394972] [2020-10-13 09:36:36,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:36:36,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 09:36:36,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62831848] [2020-10-13 09:36:36,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:36:36,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:36:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:36:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:36:36,078 INFO L87 Difference]: Start difference. First operand 9019 states and 13495 transitions. Second operand 5 states. [2020-10-13 09:36:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:36:53,911 INFO L93 Difference]: Finished difference Result 22005 states and 34108 transitions. [2020-10-13 09:36:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:36:53,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-13 09:36:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:36:53,963 INFO L225 Difference]: With dead ends: 22005 [2020-10-13 09:36:53,963 INFO L226 Difference]: Without dead ends: 12992 [2020-10-13 09:36:53,986 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 09:36:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12992 states. [2020-10-13 09:36:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12992 to 11669. [2020-10-13 09:36:54,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11669 states. [2020-10-13 09:36:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 16763 transitions. [2020-10-13 09:36:54,263 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 16763 transitions. Word has length 127 [2020-10-13 09:36:54,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:36:54,264 INFO L479 AbstractCegarLoop]: Abstraction has 11669 states and 16763 transitions. [2020-10-13 09:36:54,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:36:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 16763 transitions. [2020-10-13 09:36:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 09:36:54,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:36:54,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:36:54,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 09:36:54,272 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:36:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:36:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1721926440, now seen corresponding path program 1 times [2020-10-13 09:36:54,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:36:54,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235507315] [2020-10-13 09:36:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:36:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:54,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:54,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:55,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:55,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 09:36:55,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 09:36:55,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-13 09:36:55,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:36:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-13 09:36:55,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:36:55,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:55,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:36:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:55,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:55,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:55,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:36:55,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:55,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 09:36:55,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:55,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 09:36:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:36:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 09:36:55,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:55,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:36:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:36:55,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:36:55,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:36:55,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 09:36:55,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:36:55,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-13 09:36:55,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:36:55,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:36:55,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-13 09:36:55,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:36:55,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:36:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:36:55,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235507315] [2020-10-13 09:36:55,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:36:55,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 09:36:55,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325243553] [2020-10-13 09:36:55,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 09:36:55,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:36:55,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 09:36:55,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 09:36:55,723 INFO L87 Difference]: Start difference. First operand 11669 states and 16763 transitions. Second operand 5 states. [2020-10-13 09:37:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:37:21,860 INFO L93 Difference]: Finished difference Result 32532 states and 48139 transitions. [2020-10-13 09:37:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 09:37:21,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-13 09:37:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:37:21,953 INFO L225 Difference]: With dead ends: 32532 [2020-10-13 09:37:21,953 INFO L226 Difference]: Without dead ends: 20869 [2020-10-13 09:37:21,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 09:37:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20869 states. [2020-10-13 09:37:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20869 to 18688. [2020-10-13 09:37:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18688 states. [2020-10-13 09:37:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18688 states to 18688 states and 25268 transitions. [2020-10-13 09:37:22,618 INFO L78 Accepts]: Start accepts. Automaton has 18688 states and 25268 transitions. Word has length 150 [2020-10-13 09:37:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:37:22,619 INFO L479 AbstractCegarLoop]: Abstraction has 18688 states and 25268 transitions. [2020-10-13 09:37:22,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 09:37:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand 18688 states and 25268 transitions. [2020-10-13 09:37:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 09:37:22,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:37:22,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:37:22,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 09:37:22,628 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:37:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:37:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2142398435, now seen corresponding path program 1 times [2020-10-13 09:37:22,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:37:22,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349447377] [2020-10-13 09:37:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:37:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:23,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:23,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 09:37:23,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:23,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-13 09:37:23,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 09:37:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:37:23,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-13 09:37:23,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:23,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:37:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:23,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:23,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:23,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:37:23,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:23,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 09:37:23,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:37:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:23,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:37:23,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:37:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:23,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:23,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:23,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 09:37:23,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:23,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-13 09:37:23,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:23,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:37:23,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:37:23,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-13 09:37:23,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 09:37:23,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349447377] [2020-10-13 09:37:23,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 09:37:23,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 09:37:23,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907386154] [2020-10-13 09:37:23,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 09:37:23,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:37:23,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 09:37:23,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 09:37:23,754 INFO L87 Difference]: Start difference. First operand 18688 states and 25268 transitions. Second operand 8 states. [2020-10-13 09:37:50,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 09:37:50,826 INFO L93 Difference]: Finished difference Result 55845 states and 77443 transitions. [2020-10-13 09:37:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 09:37:50,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 171 [2020-10-13 09:37:50,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 09:37:50,916 INFO L225 Difference]: With dead ends: 55845 [2020-10-13 09:37:50,916 INFO L226 Difference]: Without dead ends: 31448 [2020-10-13 09:37:50,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-13 09:37:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31448 states. [2020-10-13 09:37:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31448 to 24484. [2020-10-13 09:37:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24484 states. [2020-10-13 09:37:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24484 states to 24484 states and 30331 transitions. [2020-10-13 09:37:51,533 INFO L78 Accepts]: Start accepts. Automaton has 24484 states and 30331 transitions. Word has length 171 [2020-10-13 09:37:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 09:37:51,533 INFO L479 AbstractCegarLoop]: Abstraction has 24484 states and 30331 transitions. [2020-10-13 09:37:51,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 09:37:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 24484 states and 30331 transitions. [2020-10-13 09:37:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-13 09:37:51,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 09:37:51,543 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-13 09:37:51,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 09:37:51,544 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 09:37:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 09:37:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 215261976, now seen corresponding path program 1 times [2020-10-13 09:37:51,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 09:37:51,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624809488] [2020-10-13 09:37:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 09:37:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:51,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:53,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:53,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-13 09:37:53,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:53,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1980 [2020-10-13 09:37:53,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:53,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 09:37:53,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 09:37:53,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 236 [2020-10-13 09:37:53,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:53,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 09:37:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:53,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:53,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:53,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 09:37:53,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:53,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 09:37:53,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 09:37:53,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 09:37:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 09:37:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 09:37:53,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:54,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:54,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 09:37:54,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:54,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-13 09:37:54,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:54,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 09:37:54,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:37:54,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 09:37:54,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:54,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-13 09:37:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 09:37:54,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 09:37:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 09:37:54,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 09:37:54,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 09:37:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-13 09:37:54,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 09:37:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 09:37:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 09:37:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-13 09:37:54,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 09:37:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 09:37:54,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624809488] [2020-10-13 09:37:54,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 09:37:54,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 09:37:54,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119604761] [2020-10-13 09:37:54,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 09:37:54,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 09:37:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 09:37:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 09:37:54,623 INFO L87 Difference]: Start difference. First operand 24484 states and 30331 transitions. Second operand 9 states.