/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/array-crafted/zero_sum4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:18:49,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:18:49,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:18:49,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:18:49,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:18:49,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:18:49,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:18:49,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:18:49,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:18:49,249 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:18:49,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:18:49,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:18:49,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:18:49,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:18:49,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:18:49,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:18:49,256 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:18:49,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:18:49,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:18:49,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:18:49,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:18:49,262 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:18:49,263 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:18:49,264 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:18:49,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:18:49,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:18:49,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:18:49,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:18:49,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:18:49,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:18:49,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:18:49,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:18:49,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:18:49,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:18:49,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:18:49,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:18:49,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:18:49,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:18:49,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:18:49,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:18:49,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:18:49,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:18:49,320 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:18:49,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:18:49,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:18:49,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:18:49,325 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:18:49,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:18:49,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:18:49,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:18:49,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:18:49,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:18:49,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:18:49,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:18:49,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:18:49,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:18:49,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:18:49,327 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:18:49,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:18:49,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:18:49,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:18:49,330 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:18:49,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:18:49,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:49,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:18:49,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:18:49,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:18:49,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:18:49,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:18:49,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:18:49,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:18:49,334 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:18:49,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:18:49,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:18:49,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:18:49,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:18:49,674 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:18:49,675 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-13 23:18:49,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e3faab3e/f1d5985e6b1a47f7905ab8d98d52a912/FLAGe00471555 [2020-10-13 23:18:50,158 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:18:50,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum4.c [2020-10-13 23:18:50,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e3faab3e/f1d5985e6b1a47f7905ab8d98d52a912/FLAGe00471555 [2020-10-13 23:18:50,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e3faab3e/f1d5985e6b1a47f7905ab8d98d52a912 [2020-10-13 23:18:50,559 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:18:50,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:18:50,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:50,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:18:50,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:18:50,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eefe0a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50, skipping insertion in model container [2020-10-13 23:18:50,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:18:50,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:18:50,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:50,775 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:18:50,802 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:50,821 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:18:50,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50 WrapperNode [2020-10-13 23:18:50,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:50,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:18:50,823 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:18:50,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:18:50,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:18:50,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:18:50,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:18:50,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:18:50,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:51,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:18:51,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:18:51,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:18:51,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:18:51,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:18:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:18:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:18:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:18:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:18:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-13 23:18:51,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:18:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:18:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:18:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:18:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:18:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:18:51,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:18:51,316 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:18:51,316 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 23:18:51,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:51 BoogieIcfgContainer [2020-10-13 23:18:51,322 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:18:51,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:18:51,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:18:51,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:18:51,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:18:50" (1/3) ... [2020-10-13 23:18:51,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f20ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:51, skipping insertion in model container [2020-10-13 23:18:51,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (2/3) ... [2020-10-13 23:18:51,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45f20ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:51, skipping insertion in model container [2020-10-13 23:18:51,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:51" (3/3) ... [2020-10-13 23:18:51,332 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum4.c [2020-10-13 23:18:51,344 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:18:51,352 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:18:51,369 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:18:51,410 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:18:51,411 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:18:51,411 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:18:51,411 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:18:51,411 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:18:51,411 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:18:51,411 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:18:51,412 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:18:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-13 23:18:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:18:51,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:51,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:51,449 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:51,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1372119815, now seen corresponding path program 1 times [2020-10-13 23:18:51,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:51,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738667502] [2020-10-13 23:18:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:51,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:54,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:54,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:18:54,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:18:54,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3182 [2020-10-13 23:18:54,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:54,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:54,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 23:18:54,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:54,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:18:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:54,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:54,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:54,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:18:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:54,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:18:54,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738667502] [2020-10-13 23:18:54,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:54,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:18:54,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549573683] [2020-10-13 23:18:54,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:18:54,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:54,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:18:54,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:54,947 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-10-13 23:18:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:55,114 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2020-10-13 23:18:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:18:55,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 23:18:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:55,127 INFO L225 Difference]: With dead ends: 83 [2020-10-13 23:18:55,128 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 23:18:55,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 23:18:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 23:18:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 23:18:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-13 23:18:55,182 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2020-10-13 23:18:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:55,183 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-13 23:18:55,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:18:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-13 23:18:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:18:55,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:55,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:18:55,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:18:55,190 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:55,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:55,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1010830987, now seen corresponding path program 1 times [2020-10-13 23:18:55,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:55,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401417618] [2020-10-13 23:18:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:55,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:00,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:19:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:00,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:00,211 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:19:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:19:00,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:00,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:00,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:00,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:19:00,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:00,284 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:00,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:00,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:00,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401417618] [2020-10-13 23:19:00,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:00,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:19:00,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974905741] [2020-10-13 23:19:00,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:19:00,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:00,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:19:00,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:19:00,301 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-10-13 23:19:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:00,438 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-13 23:19:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:19:00,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 23:19:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:00,441 INFO L225 Difference]: With dead ends: 69 [2020-10-13 23:19:00,441 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 23:19:00,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:19:00,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 23:19:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 23:19:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:19:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-13 23:19:00,457 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2020-10-13 23:19:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:00,457 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-13 23:19:00,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:19:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-13 23:19:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:19:00,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:00,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:00,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:19:00,460 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:00,460 INFO L82 PathProgramCache]: Analyzing trace with hash 195310771, now seen corresponding path program 1 times [2020-10-13 23:19:00,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:00,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947514528] [2020-10-13 23:19:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:00,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:05,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:19:05,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:05,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:19:05,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:05,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:05,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:19:05,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:05,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:05,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:05,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:05,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:05,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:05,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:05,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:05,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:05,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:05,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:05,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:05,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:19:05,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947514528] [2020-10-13 23:19:05,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:05,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:19:05,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784652831] [2020-10-13 23:19:05,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:05,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:05,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:05,556 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-13 23:19:05,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:05,750 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-10-13 23:19:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:19:05,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 23:19:05,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:05,753 INFO L225 Difference]: With dead ends: 81 [2020-10-13 23:19:05,753 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 23:19:05,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:19:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 23:19:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2020-10-13 23:19:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 23:19:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-13 23:19:05,762 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 30 [2020-10-13 23:19:05,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:05,763 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-13 23:19:05,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-13 23:19:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 23:19:05,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:05,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:05,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:19:05,765 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash -272812125, now seen corresponding path program 1 times [2020-10-13 23:19:05,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:05,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861316765] [2020-10-13 23:19:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:05,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:10,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 23:19:10,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:19:10,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:19:10,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:10,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:19:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:10,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 23:19:10,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:10,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:10,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:10,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:10,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:10,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:10,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:10,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:10,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:10,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 23:19:10,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861316765] [2020-10-13 23:19:10,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:10,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:19:10,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163761804] [2020-10-13 23:19:10,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:19:10,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:19:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:19:10,835 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-10-13 23:19:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:11,035 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-13 23:19:11,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:19:11,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-13 23:19:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:11,037 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:19:11,037 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 23:19:11,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:19:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 23:19:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-13 23:19:11,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 23:19:11,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-13 23:19:11,047 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 46 [2020-10-13 23:19:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:11,047 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-13 23:19:11,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:19:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-13 23:19:11,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:19:11,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:11,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:11,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:19:11,050 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1413552787, now seen corresponding path program 2 times [2020-10-13 23:19:11,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:11,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978115785] [2020-10-13 23:19:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:11,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:15,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:16,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:16,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:19:16,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:16,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-13 23:19:16,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:16,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:16,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:16,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:19:16,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:16,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:16,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:16,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:16,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:16,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:16,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:16,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:16,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:16,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:16,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:16,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:16,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 23:19:16,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978115785] [2020-10-13 23:19:16,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:16,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:19:16,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403625575] [2020-10-13 23:19:16,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:16,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:16,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:16,245 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 5 states. [2020-10-13 23:19:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:16,366 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2020-10-13 23:19:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:19:16,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-10-13 23:19:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:16,367 INFO L225 Difference]: With dead ends: 118 [2020-10-13 23:19:16,367 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 23:19:16,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 23:19:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 23:19:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 23:19:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 23:19:16,380 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 62 [2020-10-13 23:19:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:16,381 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 23:19:16,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 23:19:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 23:19:16,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:16,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:16,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:19:16,385 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:16,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1171459665, now seen corresponding path program 3 times [2020-10-13 23:19:16,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:16,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021236556] [2020-10-13 23:19:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:16,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:16,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:21,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 23:19:21,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:19:21,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 23:19:21,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:21,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:21,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 23:19:21,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:21,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 23:19:21,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:23,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:23,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:23,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:23,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:23,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:23,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:23,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:23,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:23,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:23,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021236556] [2020-10-13 23:19:23,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:23,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 23:19:23,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039542091] [2020-10-13 23:19:23,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 23:19:23,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:23,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 23:19:23,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2020-10-13 23:19:23,199 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 32 states. [2020-10-13 23:19:24,183 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-13 23:19:26,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:26,550 INFO L93 Difference]: Finished difference Result 174 states and 202 transitions. [2020-10-13 23:19:26,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 23:19:26,552 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2020-10-13 23:19:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:26,555 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:19:26,556 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 23:19:26,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=296, Invalid=2460, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:19:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 23:19:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2020-10-13 23:19:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-13 23:19:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 185 transitions. [2020-10-13 23:19:26,577 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 185 transitions. Word has length 64 [2020-10-13 23:19:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:26,578 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 185 transitions. [2020-10-13 23:19:26,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 23:19:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 185 transitions. [2020-10-13 23:19:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:19:26,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:26,579 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:26,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:19:26,579 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1056909519, now seen corresponding path program 4 times [2020-10-13 23:19:26,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:26,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212292613] [2020-10-13 23:19:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:26,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:31,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:19:31,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:31,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:31,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:31,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:31,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:31,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:31,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 23:19:31,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:31,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:31,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:31,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:31,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:31,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:31,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:31,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:31,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:31,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:31,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:31,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 23:19:31,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212292613] [2020-10-13 23:19:31,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:31,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:31,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441329546] [2020-10-13 23:19:31,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:31,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:31,688 INFO L87 Difference]: Start difference. First operand 159 states and 185 transitions. Second operand 10 states. [2020-10-13 23:19:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:32,050 INFO L93 Difference]: Finished difference Result 247 states and 285 transitions. [2020-10-13 23:19:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:32,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 23:19:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:32,053 INFO L225 Difference]: With dead ends: 247 [2020-10-13 23:19:32,053 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:19:32,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:19:32,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:19:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2020-10-13 23:19:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 23:19:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2020-10-13 23:19:32,067 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 66 [2020-10-13 23:19:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:32,067 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2020-10-13 23:19:32,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2020-10-13 23:19:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:19:32,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:32,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:32,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:19:32,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:32,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2005896781, now seen corresponding path program 5 times [2020-10-13 23:19:32,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:32,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711521046] [2020-10-13 23:19:32,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:37,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:19:37,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:37,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:19:37,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:37,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:37,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:37,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:37,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 23:19:37,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:37,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:37,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:37,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:37,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:37,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:37,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:37,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:37,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:37,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:37,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-13 23:19:37,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711521046] [2020-10-13 23:19:37,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:37,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:37,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508445369] [2020-10-13 23:19:37,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:37,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:37,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:37,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:37,166 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand 10 states. [2020-10-13 23:19:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:37,501 INFO L93 Difference]: Finished difference Result 165 states and 193 transitions. [2020-10-13 23:19:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:19:37,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-13 23:19:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:37,503 INFO L225 Difference]: With dead ends: 165 [2020-10-13 23:19:37,503 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 23:19:37,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:19:37,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 23:19:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 23:19:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:19:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 23:19:37,512 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2020-10-13 23:19:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:37,513 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 23:19:37,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 23:19:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:19:37,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:37,514 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:37,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:19:37,514 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash 815682943, now seen corresponding path program 6 times [2020-10-13 23:19:37,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:37,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318670273] [2020-10-13 23:19:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:37,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:41,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:42,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:42,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:19:42,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:42,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:42,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:42,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 23:19:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:42,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 23:19:42,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:47,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:47,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:47,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:47,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:47,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:47,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:47,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:47,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:47,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:48,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318670273] [2020-10-13 23:19:48,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:48,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-13 23:19:48,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585113915] [2020-10-13 23:19:48,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-13 23:19:48,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-13 23:19:48,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3116, Unknown=0, NotChecked=0, Total=3422 [2020-10-13 23:19:48,063 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 59 states. [2020-10-13 23:19:48,334 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-13 23:19:49,260 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2020-10-13 23:19:49,561 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2020-10-13 23:19:49,790 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-13 23:19:50,067 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2020-10-13 23:19:50,308 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-10-13 23:19:50,961 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-13 23:19:51,429 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-13 23:19:51,809 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 59 [2020-10-13 23:19:52,113 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2020-10-13 23:19:52,362 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-10-13 23:19:55,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:55,535 INFO L93 Difference]: Finished difference Result 189 states and 213 transitions. [2020-10-13 23:19:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 23:19:55,536 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 82 [2020-10-13 23:19:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:55,538 INFO L225 Difference]: With dead ends: 189 [2020-10-13 23:19:55,538 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:19:55,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=685, Invalid=5635, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 23:19:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:19:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-13 23:19:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 23:19:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2020-10-13 23:19:55,550 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 82 [2020-10-13 23:19:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:55,550 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2020-10-13 23:19:55,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-13 23:19:55,550 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2020-10-13 23:19:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:19:55,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:55,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:55,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:19:55,552 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:55,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:55,552 INFO L82 PathProgramCache]: Analyzing trace with hash 977206845, now seen corresponding path program 7 times [2020-10-13 23:19:55,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:55,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583130945] [2020-10-13 23:19:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:58,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:00,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:20:00,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:00,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:20:00,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:00,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:00,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:20:00,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:00,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:20:00,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:00,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:00,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:00,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:00,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:00,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:00,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:00,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:00,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:00,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 23:20:00,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583130945] [2020-10-13 23:20:00,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:00,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:20:00,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176857946] [2020-10-13 23:20:00,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:20:00,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:20:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:20:00,673 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand 12 states. [2020-10-13 23:20:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:01,284 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2020-10-13 23:20:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:20:01,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 23:20:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:01,286 INFO L225 Difference]: With dead ends: 162 [2020-10-13 23:20:01,287 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 23:20:01,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:20:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 23:20:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 23:20:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:20:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-13 23:20:01,317 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 84 [2020-10-13 23:20:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:01,318 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-13 23:20:01,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:20:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-13 23:20:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:20:01,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:01,322 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:01,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:20:01,322 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1253839571, now seen corresponding path program 8 times [2020-10-13 23:20:01,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:01,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266825468] [2020-10-13 23:20:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:01,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:03,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 23:20:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:06,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:20:06,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:11,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:11,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:11,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:11,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:11,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266825468] [2020-10-13 23:20:11,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:11,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-13 23:20:11,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977991086] [2020-10-13 23:20:11,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-13 23:20:11,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-13 23:20:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4045, Unknown=0, NotChecked=0, Total=4290 [2020-10-13 23:20:11,609 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 66 states. [2020-10-13 23:20:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:16,540 INFO L93 Difference]: Finished difference Result 262 states and 286 transitions. [2020-10-13 23:20:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-13 23:20:16,541 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 100 [2020-10-13 23:20:16,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:16,543 INFO L225 Difference]: With dead ends: 262 [2020-10-13 23:20:16,543 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 23:20:16,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=359, Invalid=6613, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 23:20:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 23:20:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 166. [2020-10-13 23:20:16,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 23:20:16,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 181 transitions. [2020-10-13 23:20:16,561 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 181 transitions. Word has length 100 [2020-10-13 23:20:16,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:16,561 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 181 transitions. [2020-10-13 23:20:16,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-13 23:20:16,562 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 181 transitions. [2020-10-13 23:20:16,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 23:20:16,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:16,563 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:16,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:20:16,563 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash -288816789, now seen corresponding path program 9 times [2020-10-13 23:20:16,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:16,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710339551] [2020-10-13 23:20:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:16,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:16,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:16,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:16,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:16,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:20,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:21,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:21,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:20:21,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:21,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:21,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:21,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:21,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:21,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:21,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:21,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:21,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:21,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:21,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:21,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:21,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 23:20:21,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710339551] [2020-10-13 23:20:21,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:21,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:21,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396354934] [2020-10-13 23:20:21,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:21,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:21,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:21,727 INFO L87 Difference]: Start difference. First operand 166 states and 181 transitions. Second operand 14 states. [2020-10-13 23:20:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:22,771 INFO L93 Difference]: Finished difference Result 326 states and 356 transitions. [2020-10-13 23:20:22,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:20:22,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 23:20:22,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:22,774 INFO L225 Difference]: With dead ends: 326 [2020-10-13 23:20:22,774 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 23:20:22,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:20:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 23:20:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2020-10-13 23:20:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 23:20:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 183 transitions. [2020-10-13 23:20:22,803 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 183 transitions. Word has length 102 [2020-10-13 23:20:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:22,805 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 183 transitions. [2020-10-13 23:20:22,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 183 transitions. [2020-10-13 23:20:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 23:20:22,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:22,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:22,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:20:22,811 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1559503063, now seen corresponding path program 10 times [2020-10-13 23:20:22,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:22,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429912042] [2020-10-13 23:20:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:22,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:23,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:27,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:27,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 23:20:27,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 23:20:27,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:27,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:28,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:28,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:28,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:28,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:28,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 23:20:28,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429912042] [2020-10-13 23:20:28,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:28,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:28,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664205809] [2020-10-13 23:20:28,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:28,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:28,028 INFO L87 Difference]: Start difference. First operand 168 states and 183 transitions. Second operand 14 states. [2020-10-13 23:20:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:28,690 INFO L93 Difference]: Finished difference Result 249 states and 277 transitions. [2020-10-13 23:20:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:20:28,691 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 104 [2020-10-13 23:20:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:28,692 INFO L225 Difference]: With dead ends: 249 [2020-10-13 23:20:28,692 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 23:20:28,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:20:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 23:20:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-13 23:20:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 23:20:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-13 23:20:28,703 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 104 [2020-10-13 23:20:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:28,703 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-13 23:20:28,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-13 23:20:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 23:20:28,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:28,705 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:20:28,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:20:28,705 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:28,705 INFO L82 PathProgramCache]: Analyzing trace with hash -512707237, now seen corresponding path program 11 times [2020-10-13 23:20:28,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:28,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494582444] [2020-10-13 23:20:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:28,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:31,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:33,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 23:20:33,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:35,852 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2020-10-13 23:20:36,021 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-13 23:20:36,199 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-13 23:20:36,401 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2020-10-13 23:20:37,766 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-13 23:20:37,966 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-13 23:20:38,218 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2020-10-13 23:20:38,606 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2020-10-13 23:20:38,826 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-13 23:20:39,079 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-13 23:20:39,304 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2020-10-13 23:20:39,523 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-13 23:20:39,819 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-13 23:20:40,043 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-10-13 23:20:40,284 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-13 23:20:40,518 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-10-13 23:20:40,738 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 25 [2020-10-13 23:20:41,027 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2020-10-13 23:20:41,320 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2020-10-13 23:20:41,588 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2020-10-13 23:20:41,859 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2020-10-13 23:20:42,134 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-13 23:20:42,434 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-13 23:20:43,140 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-13 23:20:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:48,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:48,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:48,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:48,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:48,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:48,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:48,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:48,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:48,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:48,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 24 proven. 176 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:20:48,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494582444] [2020-10-13 23:20:48,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:48,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-13 23:20:48,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668192307] [2020-10-13 23:20:48,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-13 23:20:48,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:48,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-13 23:20:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=5682, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 23:20:48,418 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 78 states. [2020-10-13 23:20:49,512 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-13 23:20:50,052 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2020-10-13 23:20:50,428 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 77 [2020-10-13 23:20:50,770 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 70 [2020-10-13 23:20:51,032 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-13 23:20:51,271 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-13 23:20:51,501 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-10-13 23:20:52,232 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-13 23:20:53,389 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-13 23:20:54,227 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2020-10-13 23:20:54,637 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2020-10-13 23:20:54,911 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-13 23:20:55,393 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 41 [2020-10-13 23:20:55,629 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-10-13 23:20:56,130 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2020-10-13 23:20:56,723 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 72 [2020-10-13 23:20:57,152 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 60 [2020-10-13 23:20:57,821 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 78 [2020-10-13 23:20:58,324 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 72 [2020-10-13 23:20:58,767 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 65 [2020-10-13 23:20:59,178 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-10-13 23:20:59,504 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 54 [2020-10-13 23:20:59,986 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 51 [2020-10-13 23:21:00,658 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 88 [2020-10-13 23:21:01,347 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 70 [2020-10-13 23:21:01,960 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 42 [2020-10-13 23:21:03,291 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 95 [2020-10-13 23:21:03,653 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 34 [2020-10-13 23:21:04,151 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 32 [2020-10-13 23:21:04,613 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 30 [2020-10-13 23:21:04,976 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 27 [2020-10-13 23:21:05,332 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 27 [2020-10-13 23:21:05,960 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 55 [2020-10-13 23:21:06,712 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-10-13 23:21:07,125 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 50 [2020-10-13 23:21:07,461 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 41 [2020-10-13 23:21:07,895 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 37 [2020-10-13 23:21:08,639 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 98 [2020-10-13 23:21:09,232 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 55 [2020-10-13 23:21:09,773 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 72 [2020-10-13 23:21:10,515 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 73 [2020-10-13 23:21:11,121 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 77 [2020-10-13 23:21:11,581 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 64 [2020-10-13 23:21:12,259 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 78 [2020-10-13 23:21:13,020 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 85 [2020-10-13 23:21:13,483 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2020-10-13 23:21:14,051 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 79 [2020-10-13 23:21:14,455 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2020-10-13 23:21:14,970 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 72 [2020-10-13 23:21:15,347 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 58 [2020-10-13 23:21:15,817 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2020-10-13 23:21:16,150 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 51 [2020-10-13 23:21:16,570 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 58 [2020-10-13 23:21:16,873 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-13 23:21:17,395 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 56 [2020-10-13 23:21:17,681 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2020-10-13 23:21:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:22,836 INFO L93 Difference]: Finished difference Result 249 states and 270 transitions. [2020-10-13 23:21:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-13 23:21:22,837 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 118 [2020-10-13 23:21:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:22,841 INFO L225 Difference]: With dead ends: 249 [2020-10-13 23:21:22,841 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 23:21:22,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 12 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=2071, Invalid=19685, Unknown=0, NotChecked=0, Total=21756 [2020-10-13 23:21:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 23:21:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 196. [2020-10-13 23:21:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 23:21:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 211 transitions. [2020-10-13 23:21:22,868 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 211 transitions. Word has length 118 [2020-10-13 23:21:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:22,868 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 211 transitions. [2020-10-13 23:21:22,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-13 23:21:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 211 transitions. [2020-10-13 23:21:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 23:21:22,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:22,870 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:22,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:21:22,870 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash 625333785, now seen corresponding path program 12 times [2020-10-13 23:21:22,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:22,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451232350] [2020-10-13 23:21:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:22,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:22,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:23,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:27,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:27,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 23:21:27,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:21:27,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:21:27,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:27,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:21:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:27,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:21:27,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:28,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:28,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:28,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:28,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:28,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:28,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:28,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:28,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:28,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:28,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 23:21:28,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451232350] [2020-10-13 23:21:28,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:28,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:21:28,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95349142] [2020-10-13 23:21:28,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:21:28,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:21:28,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:21:28,159 INFO L87 Difference]: Start difference. First operand 196 states and 211 transitions. Second operand 16 states. [2020-10-13 23:21:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:29,292 INFO L93 Difference]: Finished difference Result 439 states and 474 transitions. [2020-10-13 23:21:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:21:29,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 23:21:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:29,295 INFO L225 Difference]: With dead ends: 439 [2020-10-13 23:21:29,295 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 23:21:29,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:21:29,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 23:21:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2020-10-13 23:21:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 23:21:29,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 213 transitions. [2020-10-13 23:21:29,314 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 213 transitions. Word has length 120 [2020-10-13 23:21:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:29,314 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 213 transitions. [2020-10-13 23:21:29,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:21:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 213 transitions. [2020-10-13 23:21:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:21:29,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:29,315 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:29,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:21:29,315 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:29,316 INFO L82 PathProgramCache]: Analyzing trace with hash -941621161, now seen corresponding path program 13 times [2020-10-13 23:21:29,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:29,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694889807] [2020-10-13 23:21:29,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:29,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:29,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:29,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:29,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:34,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:34,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:21:34,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:21:34,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:21:34,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:34,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:21:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:34,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:21:34,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:34,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:34,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:34,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:34,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:34,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-13 23:21:34,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694889807] [2020-10-13 23:21:34,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:34,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:21:34,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185662996] [2020-10-13 23:21:34,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:21:34,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:21:34,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:21:34,535 INFO L87 Difference]: Start difference. First operand 198 states and 213 transitions. Second operand 16 states. [2020-10-13 23:21:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:35,445 INFO L93 Difference]: Finished difference Result 291 states and 319 transitions. [2020-10-13 23:21:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:21:35,446 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 122 [2020-10-13 23:21:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:35,447 INFO L225 Difference]: With dead ends: 291 [2020-10-13 23:21:35,447 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 23:21:35,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:21:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 23:21:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-13 23:21:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 23:21:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-13 23:21:35,460 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 122 [2020-10-13 23:21:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:35,460 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-13 23:21:35,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:21:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-13 23:21:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 23:21:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:35,462 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:35,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:21:35,462 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:35,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1185313271, now seen corresponding path program 14 times [2020-10-13 23:21:35,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:35,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123867184] [2020-10-13 23:21:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:39,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:42,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6705 [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 104 [2020-10-13 23:21:42,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 23:21:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:45,382 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2020-10-13 23:21:45,595 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2020-10-13 23:21:45,807 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-13 23:21:46,031 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-13 23:21:46,346 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-13 23:21:46,638 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-13 23:21:46,903 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-13 23:21:47,205 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-10-13 23:21:47,465 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2020-10-13 23:21:47,817 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2020-10-13 23:21:48,189 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-10-13 23:21:51,706 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-13 23:21:53,429 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-13 23:22:03,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:03,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:03,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:03,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:03,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:03,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:22:03,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:03,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:03,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:03,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 2 proven. 286 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 23:22:03,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123867184] [2020-10-13 23:22:03,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:03,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-10-13 23:22:03,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293963169] [2020-10-13 23:22:03,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-13 23:22:03,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-13 23:22:03,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=9919, Unknown=0, NotChecked=0, Total=10302 [2020-10-13 23:22:03,976 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 102 states. [2020-10-13 23:22:04,438 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 3 [2020-10-13 23:22:05,060 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 15 [2020-10-13 23:22:08,902 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-13 23:22:09,423 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-13 23:22:10,834 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 61 [2020-10-13 23:22:11,800 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2020-10-13 23:22:13,046 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 26 [2020-10-13 23:22:13,569 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 32 [2020-10-13 23:22:14,173 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-10-13 23:22:14,847 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-13 23:22:15,550 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2020-10-13 23:22:16,315 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-13 23:22:16,964 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 55 [2020-10-13 23:22:17,879 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 56 [2020-10-13 23:22:18,471 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 36 [2020-10-13 23:22:19,337 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 53 [2020-10-13 23:22:20,037 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 34 [2020-10-13 23:22:20,985 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2020-10-13 23:22:22,030 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 29 [2020-10-13 23:22:22,848 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 29 [2020-10-13 23:22:23,523 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 33 [2020-10-13 23:22:24,156 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 34 [2020-10-13 23:22:24,788 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 42 [2020-10-13 23:22:25,578 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 53 [2020-10-13 23:22:26,424 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 57 [2020-10-13 23:22:27,676 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-13 23:22:28,814 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69