/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=BIGGEST --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/loops/n.c40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:24:11,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:24:11,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:24:11,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:24:11,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:24:11,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:24:11,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:24:11,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:24:11,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:24:11,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:24:11,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:24:11,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:24:11,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:24:11,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:24:11,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:24:11,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:24:11,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:24:11,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:24:11,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:24:11,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:24:11,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:24:11,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:24:11,553 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:24:11,554 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:24:11,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:24:11,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:24:11,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:24:11,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:24:11,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:24:11,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:24:11,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:24:11,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:24:11,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:24:11,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:24:11,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:24:11,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:24:11,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:24:11,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:24:11,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:24:11,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:24:11,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:24:11,567 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 [2020-10-12 16:24:11,591 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:24:11,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:24:11,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:24:11,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:24:11,593 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:24:11,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:24:11,594 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:24:11,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:24:11,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:24:11,594 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:24:11,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:24:11,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:24:11,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:24:11,595 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:24:11,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:24:11,596 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:24:11,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:24:11,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:24:11,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:24:11,597 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:24:11,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:24:11,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:24:11,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:24:11,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:24:11,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:24:11,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:24:11,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:24:11,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:24:11,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:24:11,599 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:24:11,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:24:11,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:24:11,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:24:11,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:24:11,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:24:11,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c40.c [2020-10-12 16:24:12,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b8e03e6c/ddbb4efcb9e943c89af619ac581f5a46/FLAG7ddfe4b49 [2020-10-12 16:24:12,496 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:24:12,497 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c40.c [2020-10-12 16:24:12,504 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b8e03e6c/ddbb4efcb9e943c89af619ac581f5a46/FLAG7ddfe4b49 [2020-10-12 16:24:12,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b8e03e6c/ddbb4efcb9e943c89af619ac581f5a46 [2020-10-12 16:24:12,866 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:24:12,868 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:24:12,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:24:12,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:24:12,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:24:12,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:24:12" (1/1) ... [2020-10-12 16:24:12,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29fcb34f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:12, skipping insertion in model container [2020-10-12 16:24:12,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:24:12" (1/1) ... [2020-10-12 16:24:12,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:24:12,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:24:13,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:24:13,098 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:24:13,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:24:13,140 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:24:13,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13 WrapperNode [2020-10-12 16:24:13,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:24:13,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:24:13,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:24:13,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:24:13,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (1/1) ... [2020-10-12 16:24:13,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:24:13,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:24:13,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:24:13,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:24:13,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (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 [2020-10-12 16:24:13,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:24:13,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:24:13,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:24:13,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 16:24:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:24:13,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 16:24:13,560 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:24:13,561 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:24:13,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:24:13 BoogieIcfgContainer [2020-10-12 16:24:13,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:24:13,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:24:13,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:24:13,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:24:13,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:24:12" (1/3) ... [2020-10-12 16:24:13,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591c9a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:24:13, skipping insertion in model container [2020-10-12 16:24:13,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:24:13" (2/3) ... [2020-10-12 16:24:13,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@591c9a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:24:13, skipping insertion in model container [2020-10-12 16:24:13,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:24:13" (3/3) ... [2020-10-12 16:24:13,578 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c40.c [2020-10-12 16:24:13,600 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:24:13,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:24:13,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:24:13,685 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:24:13,685 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:24:13,685 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:24:13,685 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:24:13,686 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:24:13,686 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:24:13,686 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:24:13,686 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:24:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-12 16:24:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:24:13,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:13,721 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:13,722 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:13,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:13,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1526440521, now seen corresponding path program 1 times [2020-10-12 16:24:13,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:13,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948815205] [2020-10-12 16:24:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:13,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:13,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:14,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:14,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-12 16:24:14,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:14,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 297 [2020-10-12 16:24:14,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:14,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:24:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:14,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:24:14,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:24:14,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:14,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:14,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:14,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:14,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 16:24:14,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:14,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:14,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:14,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:14,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:14,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948815205] [2020-10-12 16:24:14,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:24:14,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:24:14,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951119311] [2020-10-12 16:24:14,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:24:14,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:14,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:24:14,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:24:14,381 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-10-12 16:24:14,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:14,537 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-12 16:24:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:24:14,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-12 16:24:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:14,550 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:24:14,551 INFO L226 Difference]: Without dead ends: 15 [2020-10-12 16:24:14,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:24:14,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-12 16:24:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-12 16:24:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:24:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 16:24:14,596 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-10-12 16:24:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:14,597 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 16:24:14,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:24:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 16:24:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:24:14,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:14,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:14,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:24:14,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:14,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1999502604, now seen corresponding path program 1 times [2020-10-12 16:24:14,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:14,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123480018] [2020-10-12 16:24:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:14,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:15,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:15,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:24:15,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:24:15,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 465 [2020-10-12 16:24:15,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:15,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:24:15,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:15,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:24:15,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:15,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:15,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:15,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:15,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:15,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 16:24:15,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:15,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:15,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 16:24:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:15,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123480018] [2020-10-12 16:24:15,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:15,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:24:15,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921364591] [2020-10-12 16:24:15,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:24:15,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:24:15,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:24:15,325 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-12 16:24:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:15,481 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-12 16:24:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:24:15,483 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-12 16:24:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:15,484 INFO L225 Difference]: With dead ends: 22 [2020-10-12 16:24:15,484 INFO L226 Difference]: Without dead ends: 17 [2020-10-12 16:24:15,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:24:15,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-12 16:24:15,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-12 16:24:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:24:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-12 16:24:15,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-12 16:24:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:15,499 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-12 16:24:15,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:24:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-12 16:24:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:24:15,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:15,500 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:15,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:24:15,501 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1114495599, now seen corresponding path program 2 times [2020-10-12 16:24:15,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:15,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278879554] [2020-10-12 16:24:15,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:15,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:15,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:16,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:16,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:24:16,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:24:16,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-12 16:24:16,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:16,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:24:16,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:16,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:24:16,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:16,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:16,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:16,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:16,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:16,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:16,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 16:24:16,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:16,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:16,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:16,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:16,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:16,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278879554] [2020-10-12 16:24:16,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:16,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:24:16,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975511230] [2020-10-12 16:24:16,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:24:16,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:16,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:24:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:24:16,412 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-10-12 16:24:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:16,567 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-12 16:24:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:24:16,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-12 16:24:16,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:16,569 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:24:16,569 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:24:16,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:24:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:24:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:24:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:24:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-12 16:24:16,576 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-12 16:24:16,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:16,577 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-12 16:24:16,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:24:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-12 16:24:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:24:16,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:16,578 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:16,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:24:16,579 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:16,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:16,579 INFO L82 PathProgramCache]: Analyzing trace with hash -74563370, now seen corresponding path program 3 times [2020-10-12 16:24:16,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:16,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364867912] [2020-10-12 16:24:16,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:16,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:16,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:16,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:17,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:24:17,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:24:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-12 16:24:17,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:24:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:17,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:24:17,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:17,770 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-12 16:24:17,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:17,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:17,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:17,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:17,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:17,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 16:24:17,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:17,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:17,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 16:24:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:17,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364867912] [2020-10-12 16:24:17,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:17,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:24:17,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212070182] [2020-10-12 16:24:17,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:24:17,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:17,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:24:17,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:24:17,916 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2020-10-12 16:24:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:18,193 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-12 16:24:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:24:18,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-12 16:24:18,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:18,196 INFO L225 Difference]: With dead ends: 26 [2020-10-12 16:24:18,196 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 16:24:18,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:24:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 16:24:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 16:24:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:24:18,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-12 16:24:18,215 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-12 16:24:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:18,216 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-12 16:24:18,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:24:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-12 16:24:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:24:18,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:18,218 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:18,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:24:18,218 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1427071269, now seen corresponding path program 4 times [2020-10-12 16:24:18,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:18,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860455167] [2020-10-12 16:24:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:18,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:18,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:19,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:19,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:19,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:24:19,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 16:24:19,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1398 [2020-10-12 16:24:19,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:24:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:19,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:24:19,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:20,056 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-12 16:24:20,203 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-12 16:24:20,326 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-12 16:24:20,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:20,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:20,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:20,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:20,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:20,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:24:20,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:20,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:20,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:20,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:20,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860455167] [2020-10-12 16:24:20,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:20,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:24:20,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346803176] [2020-10-12 16:24:20,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:24:20,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:20,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:24:20,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:24:20,527 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 14 states. [2020-10-12 16:24:21,124 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2020-10-12 16:24:21,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:21,230 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-12 16:24:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:24:21,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2020-10-12 16:24:21,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:21,232 INFO L225 Difference]: With dead ends: 28 [2020-10-12 16:24:21,232 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:24:21,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:24:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:24:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:24:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:24:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-12 16:24:21,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-12 16:24:21,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:21,247 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-12 16:24:21,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:24:21,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-12 16:24:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:24:21,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:21,251 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:21,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:24:21,251 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:21,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash 187928480, now seen corresponding path program 5 times [2020-10-12 16:24:21,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:21,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750140452] [2020-10-12 16:24:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:21,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:21,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:21,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:21,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:22,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:23,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:23,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:24:23,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 16:24:23,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1757 [2020-10-12 16:24:23,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:23,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:24:23,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:23,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:24:23,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:23,398 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-12 16:24:23,563 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-10-12 16:24:23,744 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-12 16:24:23,967 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-12 16:24:24,220 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-12 16:24:24,497 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2020-10-12 16:24:24,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:24,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:24,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:24,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:24,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:24,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 16:24:24,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:24,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:24,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:24,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:24,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750140452] [2020-10-12 16:24:24,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:24,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:24:24,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131342744] [2020-10-12 16:24:24,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:24:24,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:24:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:24:24,604 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2020-10-12 16:24:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:24,848 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-12 16:24:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:24:24,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-12 16:24:24,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:24,849 INFO L225 Difference]: With dead ends: 30 [2020-10-12 16:24:24,849 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:24:24,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:24:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:24:24,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:24:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:24:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-12 16:24:24,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-12 16:24:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:24,857 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-12 16:24:24,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:24:24,858 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-12 16:24:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:24:24,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:24,859 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:24,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:24:24,859 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:24,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1719493413, now seen corresponding path program 6 times [2020-10-12 16:24:24,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:24,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443212088] [2020-10-12 16:24:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:24,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:24,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:24,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:24,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:25,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:26,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:26,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:26,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:24:26,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 16:24:26,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2124 [2020-10-12 16:24:26,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:24:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:24:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:27,652 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-12 16:24:27,859 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-12 16:24:28,149 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2020-10-12 16:24:28,517 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2020-10-12 16:24:29,049 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-12 16:24:29,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:29,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:29,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:29,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:29,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 16:24:29,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:29,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:29,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:29,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443212088] [2020-10-12 16:24:29,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:29,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:24:29,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321595528] [2020-10-12 16:24:29,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:24:29,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:24:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:24:29,186 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2020-10-12 16:24:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:29,545 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-12 16:24:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:24:29,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-12 16:24:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:29,548 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:24:29,548 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:24:29,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:24:29,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:24:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 16:24:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:24:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-12 16:24:29,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-12 16:24:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:29,555 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-12 16:24:29,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:24:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-12 16:24:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:24:29,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:29,556 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:29,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:24:29,556 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash 379611498, now seen corresponding path program 7 times [2020-10-12 16:24:29,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:29,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317585278] [2020-10-12 16:24:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:31,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:32,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:32,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:24:32,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 16:24:32,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3168 [2020-10-12 16:24:32,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:24:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:32,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:24:32,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:33,416 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-12 16:24:33,611 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-12 16:24:33,807 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-12 16:24:34,030 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-10-12 16:24:34,267 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2020-10-12 16:24:34,519 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2020-10-12 16:24:35,096 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 71 [2020-10-12 16:24:35,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:35,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:35,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:35,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:35,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:35,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317585278] [2020-10-12 16:24:35,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:35,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:24:35,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355637981] [2020-10-12 16:24:35,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:24:35,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:24:35,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:24:35,232 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2020-10-12 16:24:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:35,702 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-12 16:24:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:24:35,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-12 16:24:35,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:35,704 INFO L225 Difference]: With dead ends: 34 [2020-10-12 16:24:35,704 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:24:35,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:24:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:24:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-12 16:24:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:24:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-12 16:24:35,714 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-12 16:24:35,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:35,714 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-12 16:24:35,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:24:35,714 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-12 16:24:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:24:35,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:35,715 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:35,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:24:35,715 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:35,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1243279983, now seen corresponding path program 8 times [2020-10-12 16:24:35,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:35,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395023551] [2020-10-12 16:24:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:35,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:35,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:35,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:35,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:36,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:36,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:36,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:36,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:39,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:39,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:24:39,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 16:24:39,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4039 [2020-10-12 16:24:39,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:24:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:39,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:24:39,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:24:40,226 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-10-12 16:24:40,370 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2020-10-12 16:24:40,559 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 16:24:40,811 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-12 16:24:41,081 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2020-10-12 16:24:41,441 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 51 [2020-10-12 16:24:41,840 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 54 [2020-10-12 16:24:42,333 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2020-10-12 16:24:42,844 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 66 [2020-10-12 16:24:43,527 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 67 [2020-10-12 16:24:44,264 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 72 [2020-10-12 16:24:44,885 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 63 [2020-10-12 16:24:45,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:45,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:45,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:24:45,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:45,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:45,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:45,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395023551] [2020-10-12 16:24:45,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:45,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:24:45,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485161857] [2020-10-12 16:24:45,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:24:45,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:45,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:24:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:24:45,050 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2020-10-12 16:24:45,293 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2020-10-12 16:24:45,485 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-12 16:24:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:45,650 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-12 16:24:45,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:24:45,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-12 16:24:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:45,652 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:24:45,653 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:24:45,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:24:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:24:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 16:24:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:24:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-12 16:24:45,660 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-12 16:24:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:45,661 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-12 16:24:45,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:24:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-12 16:24:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:24:45,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:45,662 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:45,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:24:45,662 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:45,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1994961356, now seen corresponding path program 9 times [2020-10-12 16:24:45,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:45,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916500757] [2020-10-12 16:24:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:45,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:45,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:46,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:49,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4088 [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:24:49,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:24:49,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:24:49,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:50,471 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-12 16:24:50,745 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-12 16:24:51,087 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 16:24:51,476 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-12 16:24:51,896 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-12 16:24:52,535 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-10-12 16:24:53,252 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2020-10-12 16:24:54,077 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2020-10-12 16:24:54,951 WARN L193 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 78 [2020-10-12 16:24:56,005 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 88 [2020-10-12 16:24:57,119 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-10-12 16:24:58,318 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 160 DAG size of output: 86 [2020-10-12 16:24:58,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:24:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:58,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:58,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:24:58,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:24:58,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:24:58,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:24:58,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:24:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:24:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:24:58,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:24:58,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:24:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:24:58,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916500757] [2020-10-12 16:24:58,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:24:58,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:24:58,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995942651] [2020-10-12 16:24:58,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:24:58,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:24:58,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:24:58,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:24:58,510 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2020-10-12 16:24:59,147 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2020-10-12 16:24:59,400 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-12 16:24:59,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:24:59,415 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-12 16:24:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:24:59,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-12 16:24:59,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:24:59,416 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:24:59,416 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:24:59,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:24:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:24:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 16:24:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:24:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-12 16:24:59,431 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-12 16:24:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:24:59,432 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-12 16:24:59,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:24:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-12 16:24:59,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:24:59,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:24:59,435 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:24:59,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:24:59,435 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:24:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:24:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash -93598535, now seen corresponding path program 10 times [2020-10-12 16:24:59,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:24:59,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978250965] [2020-10-12 16:24:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:24:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:24:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:24:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:00,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:02,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:03,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:03,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:25:03,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 16:25:03,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4039 [2020-10-12 16:25:03,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:25:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:25:03,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:25:03,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:04,246 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-12 16:25:04,408 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-10-12 16:25:04,602 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-12 16:25:04,892 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 16:25:05,201 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-12 16:25:05,575 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 16:25:05,972 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-12 16:25:06,404 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2020-10-12 16:25:06,872 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 74 [2020-10-12 16:25:07,539 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 81 [2020-10-12 16:25:08,276 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2020-10-12 16:25:08,999 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 88 [2020-10-12 16:25:09,775 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-10-12 16:25:11,173 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 173 DAG size of output: 89 [2020-10-12 16:25:11,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:11,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:11,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:11,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:11,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:11,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:25:11,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:11,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:11,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:11,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:11,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978250965] [2020-10-12 16:25:11,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:11,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:25:11,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450127542] [2020-10-12 16:25:11,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:25:11,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:25:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:25:11,409 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2020-10-12 16:25:12,116 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-12 16:25:12,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:12,127 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-12 16:25:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:25:12,128 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2020-10-12 16:25:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:12,129 INFO L225 Difference]: With dead ends: 40 [2020-10-12 16:25:12,129 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:25:12,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:25:12,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:25:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 16:25:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:25:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-12 16:25:12,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-12 16:25:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:12,140 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-12 16:25:12,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:25:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-12 16:25:12,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:25:12,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:12,141 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:12,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:25:12,142 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:12,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1754971646, now seen corresponding path program 11 times [2020-10-12 16:25:12,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:12,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086730917] [2020-10-12 16:25:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:12,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:12,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:16,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:17,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:17,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:25:17,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:25:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 16:25:17,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:17,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:25:17,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:25:17,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:25:17,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:17,909 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-10-12 16:25:18,073 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-12 16:25:18,369 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-12 16:25:18,687 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2020-10-12 16:25:19,002 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2020-10-12 16:25:19,364 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2020-10-12 16:25:19,801 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2020-10-12 16:25:20,238 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-10-12 16:25:20,747 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 63 [2020-10-12 16:25:21,322 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 66 [2020-10-12 16:25:21,967 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 72 [2020-10-12 16:25:22,654 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 75 [2020-10-12 16:25:23,477 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 81 [2020-10-12 16:25:24,368 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 84 [2020-10-12 16:25:26,734 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 278 DAG size of output: 98 [2020-10-12 16:25:29,295 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 281 DAG size of output: 101 [2020-10-12 16:25:30,991 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 177 DAG size of output: 101 [2020-10-12 16:25:31,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:31,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:31,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:31,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:31,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:25:31,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:31,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086730917] [2020-10-12 16:25:31,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:31,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:25:31,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064572326] [2020-10-12 16:25:31,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:25:31,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:25:31,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:25:31,296 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2020-10-12 16:25:31,843 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-12 16:25:32,314 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 16:25:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:32,332 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-12 16:25:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:25:32,334 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2020-10-12 16:25:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:32,335 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:25:32,335 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:25:32,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:25:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:25:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 16:25:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:25:32,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-12 16:25:32,344 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-12 16:25:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:32,344 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-12 16:25:32,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:25:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-12 16:25:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:25:32,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:32,345 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:32,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:25:32,346 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash 114455043, now seen corresponding path program 12 times [2020-10-12 16:25:32,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:32,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587288055] [2020-10-12 16:25:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:32,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:32,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:33,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:34,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:37,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:37,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:25:37,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 16:25:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 16:25:37,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:25:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 16:25:37,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:25:37,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:37,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:37,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:37,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:37,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 16:25:37,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:37,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 16:25:37,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:25:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:37,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:25:37,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:25:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-12 16:25:37,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587288055] [2020-10-12 16:25:37,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:25:37,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:25:37,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011187143] [2020-10-12 16:25:37,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:25:37,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:25:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:25:37,473 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 6 states. [2020-10-12 16:25:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:37,549 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-12 16:25:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:25:37,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-12 16:25:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:37,549 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:25:37,549 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 16:25:37,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:25:37,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 16:25:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 16:25:37,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 16:25:37,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 16:25:37,551 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-10-12 16:25:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:37,552 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 16:25:37,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:25:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 16:25:37,552 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 16:25:37,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:25:37,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 16:25:37,736 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:25:37,737 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~j~0 |old(~j~0)|) (= |~#x~0.offset| |old(~#x~0.offset)|) (= |~#y~0.offset| |old(~#y~0.offset)|) (= ~i~0 |old(~i~0)|) (= |old(#length)| |#length|) (= ~k~0 |old(~k~0)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |~#y~0.base| |old(~#y~0.base)|)) [2020-10-12 16:25:37,737 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:25:37,737 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:25:37,738 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= (select |#memory_int| |~#x~0.base|) ((as const (Array Int Int)) 0)) (not (= |~#x~0.base| |~#y~0.base|)) (<= 0 ~i~0) (<= ~i~0 0)) [2020-10-12 16:25:37,738 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 16:25:37,738 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:25:37,738 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 23) no Hoare annotation was computed. [2020-10-12 16:25:37,738 INFO L268 CegarLoopResult]: For program point L19(lines 19 20) no Hoare annotation was computed. [2020-10-12 16:25:37,738 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 23) no Hoare annotation was computed. [2020-10-12 16:25:37,738 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2020-10-12 16:25:37,739 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 8 23) the Hoare annotation is: (or (not (<= 0 |old(~i~0)|)) (= |~#x~0.base| |~#y~0.base|) (not (= ((as const (Array Int Int)) 0) (select |old(#memory_int)| |~#x~0.base|))) (not (<= |old(~i~0)| 0)) (and (= ~i~0 |old(~i~0)|) (= ~k~0 |old(~k~0)|) (= |#memory_int| |old(#memory_int)|))) [2020-10-12 16:25:37,739 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-12 16:25:37,739 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-12 16:25:37,739 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2020-10-12 16:25:37,740 INFO L268 CegarLoopResult]: For program point L12-1(lines 12 15) no Hoare annotation was computed. [2020-10-12 16:25:37,740 INFO L264 CegarLoopResult]: At program point L12-3(lines 12 15) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= 0 |old(~i~0)|)) (= |~#x~0.base| |~#y~0.base|) (and (= (select |#memory_int| |~#x~0.base|) .cse0) (<= 0 ~i~0) (<= ~i~0 0)) (not (= .cse0 (select |old(#memory_int)| |~#x~0.base|))) (not (<= |old(~i~0)| 0)))) [2020-10-12 16:25:37,740 INFO L268 CegarLoopResult]: For program point L12-4(lines 12 15) no Hoare annotation was computed. [2020-10-12 16:25:37,754 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:693) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:217) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-12 16:25:37,759 INFO L168 Benchmark]: Toolchain (without parser) took 84891.19 ms. Allocated memory was 145.2 MB in the beginning and 787.5 MB in the end (delta: 642.3 MB). Free memory was 101.8 MB in the beginning and 140.0 MB in the end (delta: -38.2 MB). Peak memory consumption was 604.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:37,760 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-10-12 16:25:37,760 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.26 ms. Allocated memory is still 145.2 MB. Free memory was 101.6 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:37,761 INFO L168 Benchmark]: Boogie Preprocessor took 125.49 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 91.3 MB in the beginning and 180.1 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:37,761 INFO L168 Benchmark]: RCFGBuilder took 298.94 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 165.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:37,762 INFO L168 Benchmark]: TraceAbstraction took 84189.22 ms. Allocated memory was 201.9 MB in the beginning and 787.5 MB in the end (delta: 585.6 MB). Free memory was 164.8 MB in the beginning and 140.0 MB in the end (delta: 24.8 MB). Peak memory consumption was 610.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:37,765 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.26 ms. Allocated memory is still 145.2 MB. Free memory was 101.6 MB in the beginning and 91.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.49 ms. Allocated memory was 145.2 MB in the beginning and 201.9 MB in the end (delta: 56.6 MB). Free memory was 91.3 MB in the beginning and 180.1 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 298.94 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 165.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 84189.22 ms. Allocated memory was 201.9 MB in the beginning and 787.5 MB in the end (delta: 585.6 MB). Free memory was 164.8 MB in the beginning and 140.0 MB in the end (delta: 24.8 MB). Peak memory consumption was 610.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...