/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:55:02,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:55:02,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:55:02,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:55:02,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:55:02,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:55:02,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:55:02,219 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:55:02,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:55:02,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:55:02,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:55:02,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:55:02,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:55:02,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:55:02,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:55:02,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:55:02,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:55:02,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:55:02,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:55:02,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:55:02,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:55:02,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:55:02,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:55:02,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:55:02,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:55:02,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:55:02,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:55:02,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:55:02,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:55:02,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:55:02,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:55:02,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:55:02,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:55:02,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:55:02,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:55:02,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:55:02,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:55:02,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:55:02,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:55:02,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:55:02,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:55:02,280 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 13:55:02,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:55:02,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:55:02,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:55:02,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:55:02,310 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:55:02,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:55:02,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:55:02,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:55:02,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:55:02,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:55:02,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:55:02,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:55:02,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:55:02,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:55:02,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:55:02,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:55:02,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:55:02,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:55:02,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:55:02,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:55:02,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:55:02,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:55:02,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:55:02,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:55:02,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:55:02,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:55:02,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:55:02,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:55:02,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:55:02,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:55:02,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:55:02,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:55:02,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:55:02,622 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:55:02,622 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:55:02,623 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 13:55:02,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a00ebbf05/142fea817e174e3eae75bcb359997147/FLAGb487b44c1 [2020-10-13 13:55:03,218 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:55:03,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 13:55:03,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a00ebbf05/142fea817e174e3eae75bcb359997147/FLAGb487b44c1 [2020-10-13 13:55:03,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a00ebbf05/142fea817e174e3eae75bcb359997147 [2020-10-13 13:55:03,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:55:03,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:55:03,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:55:03,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:55:03,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:55:03,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:55:03" (1/1) ... [2020-10-13 13:55:03,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c19b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:03, skipping insertion in model container [2020-10-13 13:55:03,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:55:03" (1/1) ... [2020-10-13 13:55:03,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:55:03,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:55:04,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:55:04,124 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:55:04,276 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:55:04,296 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:55:04,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04 WrapperNode [2020-10-13 13:55:04,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:55:04,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:55:04,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:55:04,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:55:04,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (1/1) ... [2020-10-13 13:55:04,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:55:04,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:55:04,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:55:04,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:55:04,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (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 13:55:04,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:55:04,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:55:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:55:04,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:55:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:55:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:55:04,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 13:55:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:55:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:55:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:55:04,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:55:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:55:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:55:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:55:04,524 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:55:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:55:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:55:04,525 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:55:04,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:55:04,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:55:04,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:55:05,937 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:55:05,937 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:55:05,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:55:05 BoogieIcfgContainer [2020-10-13 13:55:05,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:55:05,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:55:05,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:55:05,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:55:05,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:55:03" (1/3) ... [2020-10-13 13:55:05,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561cec03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:55:05, skipping insertion in model container [2020-10-13 13:55:05,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:55:04" (2/3) ... [2020-10-13 13:55:05,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@561cec03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:55:05, skipping insertion in model container [2020-10-13 13:55:05,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:55:05" (3/3) ... [2020-10-13 13:55:05,953 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 13:55:05,964 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:55:05,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:55:05,987 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:55:06,016 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:55:06,016 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:55:06,016 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:55:06,017 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:55:06,017 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:55:06,017 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:55:06,017 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:55:06,017 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:55:06,043 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states. [2020-10-13 13:55:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 13:55:06,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:06,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:06,062 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1212431174, now seen corresponding path program 1 times [2020-10-13 13:55:06,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:06,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084770] [2020-10-13 13:55:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:06,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:07,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:08,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:08,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:11,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:11,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-13 13:55:11,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:55:11,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 13:55:11,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:11,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:55:11,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 13:55:11,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 13:55:12,172 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:12,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:12,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:12,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:12,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 13:55:12,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:12,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:12,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:12,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:12,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:12,288 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 13:55:12,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084770] [2020-10-13 13:55:12,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:12,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:12,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850960756] [2020-10-13 13:55:12,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:12,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:12,327 INFO L87 Difference]: Start difference. First operand 317 states. Second operand 5 states. [2020-10-13 13:55:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:15,743 INFO L93 Difference]: Finished difference Result 897 states and 1586 transitions. [2020-10-13 13:55:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:55:15,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-13 13:55:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:15,782 INFO L225 Difference]: With dead ends: 897 [2020-10-13 13:55:15,782 INFO L226 Difference]: Without dead ends: 601 [2020-10-13 13:55:15,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-13 13:55:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 599. [2020-10-13 13:55:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-13 13:55:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 868 transitions. [2020-10-13 13:55:15,963 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 868 transitions. Word has length 150 [2020-10-13 13:55:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:15,964 INFO L479 AbstractCegarLoop]: Abstraction has 599 states and 868 transitions. [2020-10-13 13:55:15,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 868 transitions. [2020-10-13 13:55:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 13:55:15,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:15,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:15,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:55:15,981 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:15,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:15,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1419499386, now seen corresponding path program 1 times [2020-10-13 13:55:15,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:15,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366933250] [2020-10-13 13:55:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:16,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:17,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:21,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:21,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 13:55:21,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:55:21,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 13:55:21,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:21,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:55:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:55:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:21,273 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:21,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:21,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:21,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:21,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:21,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:21,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:55:21,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:21,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:21,320 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 13:55:21,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366933250] [2020-10-13 13:55:21,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:21,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:21,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648901536] [2020-10-13 13:55:21,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:21,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:21,325 INFO L87 Difference]: Start difference. First operand 599 states and 868 transitions. Second operand 4 states. [2020-10-13 13:55:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:22,836 INFO L93 Difference]: Finished difference Result 1751 states and 2532 transitions. [2020-10-13 13:55:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:55:22,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2020-10-13 13:55:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:22,844 INFO L225 Difference]: With dead ends: 1751 [2020-10-13 13:55:22,845 INFO L226 Difference]: Without dead ends: 1184 [2020-10-13 13:55:22,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2020-10-13 13:55:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 601. [2020-10-13 13:55:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2020-10-13 13:55:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 870 transitions. [2020-10-13 13:55:22,918 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 870 transitions. Word has length 151 [2020-10-13 13:55:22,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:22,918 INFO L479 AbstractCegarLoop]: Abstraction has 601 states and 870 transitions. [2020-10-13 13:55:22,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:55:22,919 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 870 transitions. [2020-10-13 13:55:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 13:55:22,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:22,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:22,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:55:22,922 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash 496872507, now seen corresponding path program 1 times [2020-10-13 13:55:22,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:22,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516966493] [2020-10-13 13:55:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:23,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:23,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:24,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:27,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:27,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 13:55:27,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 13:55:27,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:55:27,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:27,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:27,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:55:27,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:55:27,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:55:28,364 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:28,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:28,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:28,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:28,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:28,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 13:55:28,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:28,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:28,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:28,479 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 13:55:28,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516966493] [2020-10-13 13:55:28,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:28,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:28,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341202418] [2020-10-13 13:55:28,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:28,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:28,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:28,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:28,483 INFO L87 Difference]: Start difference. First operand 601 states and 870 transitions. Second operand 5 states. [2020-10-13 13:55:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:30,289 INFO L93 Difference]: Finished difference Result 1184 states and 1714 transitions. [2020-10-13 13:55:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:30,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-13 13:55:30,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:30,293 INFO L225 Difference]: With dead ends: 1184 [2020-10-13 13:55:30,293 INFO L226 Difference]: Without dead ends: 601 [2020-10-13 13:55:30,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-10-13 13:55:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 600. [2020-10-13 13:55:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-13 13:55:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 866 transitions. [2020-10-13 13:55:30,336 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 866 transitions. Word has length 152 [2020-10-13 13:55:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:30,336 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 866 transitions. [2020-10-13 13:55:30,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 866 transitions. [2020-10-13 13:55:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 13:55:30,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:30,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:30,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:55:30,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1260966376, now seen corresponding path program 1 times [2020-10-13 13:55:30,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:30,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232360750] [2020-10-13 13:55:30,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:30,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:34,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:34,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:34,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:34,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:35,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 13:55:35,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 13:55:35,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:55:35,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:55:35,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 13:55:35,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:35,681 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:35,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:35,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:35,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:35,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:35,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:35,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:55:35,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:35,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:35,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:35,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:35,742 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 13:55:35,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232360750] [2020-10-13 13:55:35,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:35,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:35,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506443493] [2020-10-13 13:55:35,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:35,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:35,747 INFO L87 Difference]: Start difference. First operand 600 states and 866 transitions. Second operand 5 states. [2020-10-13 13:55:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:37,137 INFO L93 Difference]: Finished difference Result 1462 states and 2105 transitions. [2020-10-13 13:55:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:37,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-13 13:55:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:37,144 INFO L225 Difference]: With dead ends: 1462 [2020-10-13 13:55:37,144 INFO L226 Difference]: Without dead ends: 885 [2020-10-13 13:55:37,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-10-13 13:55:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 883. [2020-10-13 13:55:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-10-13 13:55:37,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1257 transitions. [2020-10-13 13:55:37,246 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1257 transitions. Word has length 152 [2020-10-13 13:55:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:37,246 INFO L479 AbstractCegarLoop]: Abstraction has 883 states and 1257 transitions. [2020-10-13 13:55:37,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1257 transitions. [2020-10-13 13:55:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 13:55:37,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:37,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:37,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:55:37,250 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash 603680509, now seen corresponding path program 1 times [2020-10-13 13:55:37,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:37,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120120659] [2020-10-13 13:55:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:37,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:38,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:40,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:40,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:42,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:42,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 13:55:42,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:55:42,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 13:55:42,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:42,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:55:42,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 13:55:42,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 13:55:42,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:42,557 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:42,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:42,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:42,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:42,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:42,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:42,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:42,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 13:55:42,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:42,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:55:42,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:42,636 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 13:55:42,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120120659] [2020-10-13 13:55:42,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:42,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:42,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734329720] [2020-10-13 13:55:42,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:55:42,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:55:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:42,639 INFO L87 Difference]: Start difference. First operand 883 states and 1257 transitions. Second operand 6 states. [2020-10-13 13:55:42,895 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 13:55:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:44,494 INFO L93 Difference]: Finished difference Result 2167 states and 3150 transitions. [2020-10-13 13:55:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 13:55:44,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2020-10-13 13:55:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:44,511 INFO L225 Difference]: With dead ends: 2167 [2020-10-13 13:55:44,512 INFO L226 Difference]: Without dead ends: 1452 [2020-10-13 13:55:44,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 13:55:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2020-10-13 13:55:44,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1450. [2020-10-13 13:55:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1450 states. [2020-10-13 13:55:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2091 transitions. [2020-10-13 13:55:44,654 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2091 transitions. Word has length 160 [2020-10-13 13:55:44,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:44,655 INFO L479 AbstractCegarLoop]: Abstraction has 1450 states and 2091 transitions. [2020-10-13 13:55:44,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:55:44,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2091 transitions. [2020-10-13 13:55:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-13 13:55:44,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:44,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:44,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:55:44,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:44,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:44,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1557108839, now seen corresponding path program 1 times [2020-10-13 13:55:44,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:44,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873156590] [2020-10-13 13:55:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:44,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:44,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:45,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:46,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:47,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:49,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:55:49,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 13:55:49,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:49,990 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:49,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:50,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:50,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:50,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:50,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:55:50,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:50,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:50,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:50,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:50,046 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 13:55:50,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873156590] [2020-10-13 13:55:50,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:50,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:55:50,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69330389] [2020-10-13 13:55:50,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:55:50,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:50,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:55:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:55:50,049 INFO L87 Difference]: Start difference. First operand 1450 states and 2091 transitions. Second operand 5 states. [2020-10-13 13:55:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:55:52,372 INFO L93 Difference]: Finished difference Result 4196 states and 6034 transitions. [2020-10-13 13:55:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:55:52,373 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-13 13:55:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:55:52,387 INFO L225 Difference]: With dead ends: 4196 [2020-10-13 13:55:52,387 INFO L226 Difference]: Without dead ends: 2787 [2020-10-13 13:55:52,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:55:52,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2020-10-13 13:55:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 2785. [2020-10-13 13:55:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2020-10-13 13:55:52,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 3967 transitions. [2020-10-13 13:55:52,569 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 3967 transitions. Word has length 160 [2020-10-13 13:55:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:55:52,569 INFO L479 AbstractCegarLoop]: Abstraction has 2785 states and 3967 transitions. [2020-10-13 13:55:52,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:55:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 3967 transitions. [2020-10-13 13:55:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 13:55:52,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:55:52,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:55:52,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:55:52,576 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:55:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:55:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash -407638567, now seen corresponding path program 1 times [2020-10-13 13:55:52,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:55:52,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194991221] [2020-10-13 13:55:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:55:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:52,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:52,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:53,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:53,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:53,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:53,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:54,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:54,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:54,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:54,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:55,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:55,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:57,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:57,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-13 13:55:57,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 13:55:57,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:55:57,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:57,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:55:57,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 13:55:57,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:55:57,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:57,820 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:55:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:55:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:55:57,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:55:57,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:55:57,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:55:57,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:55:57,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:55:57,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:55:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:55:57,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:55:57,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:55:57,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:55:57,859 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 13:55:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194991221] [2020-10-13 13:55:57,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:55:57,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:55:57,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140990493] [2020-10-13 13:55:57,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:55:57,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:55:57,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:55:57,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:55:57,862 INFO L87 Difference]: Start difference. First operand 2785 states and 3967 transitions. Second operand 4 states. [2020-10-13 13:56:00,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:00,478 INFO L93 Difference]: Finished difference Result 8249 states and 11746 transitions. [2020-10-13 13:56:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:56:00,479 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 161 [2020-10-13 13:56:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:00,508 INFO L225 Difference]: With dead ends: 8249 [2020-10-13 13:56:00,509 INFO L226 Difference]: Without dead ends: 5526 [2020-10-13 13:56:00,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2020-10-13 13:56:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 2791. [2020-10-13 13:56:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2791 states. [2020-10-13 13:56:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3973 transitions. [2020-10-13 13:56:00,733 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3973 transitions. Word has length 161 [2020-10-13 13:56:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:00,733 INFO L479 AbstractCegarLoop]: Abstraction has 2791 states and 3973 transitions. [2020-10-13 13:56:00,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:56:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3973 transitions. [2020-10-13 13:56:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 13:56:00,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:00,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:00,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:56:00,740 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1724488057, now seen corresponding path program 1 times [2020-10-13 13:56:00,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:00,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987206905] [2020-10-13 13:56:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:00,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:00,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:00,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:00,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:01,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:01,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:02,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:02,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:04,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:05,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 13:56:05,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 13:56:05,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:06,011 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:06,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:06,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:06,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:06,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:06,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:56:06,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:06,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:06,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:06,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:06,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:06,048 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 13:56:06,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987206905] [2020-10-13 13:56:06,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:06,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:56:06,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973202109] [2020-10-13 13:56:06,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:56:06,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:06,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:56:06,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:06,050 INFO L87 Difference]: Start difference. First operand 2791 states and 3973 transitions. Second operand 4 states. [2020-10-13 13:56:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:08,525 INFO L93 Difference]: Finished difference Result 7227 states and 10318 transitions. [2020-10-13 13:56:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:56:08,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 162 [2020-10-13 13:56:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:08,546 INFO L225 Difference]: With dead ends: 7227 [2020-10-13 13:56:08,546 INFO L226 Difference]: Without dead ends: 4884 [2020-10-13 13:56:08,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4884 states. [2020-10-13 13:56:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4884 to 4882. [2020-10-13 13:56:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4882 states. [2020-10-13 13:56:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4882 states to 4882 states and 6838 transitions. [2020-10-13 13:56:08,943 INFO L78 Accepts]: Start accepts. Automaton has 4882 states and 6838 transitions. Word has length 162 [2020-10-13 13:56:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:08,944 INFO L479 AbstractCegarLoop]: Abstraction has 4882 states and 6838 transitions. [2020-10-13 13:56:08,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:56:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4882 states and 6838 transitions. [2020-10-13 13:56:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 13:56:08,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:08,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:08,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:56:08,957 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:08,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1327516822, now seen corresponding path program 1 times [2020-10-13 13:56:08,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:08,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697500940] [2020-10-13 13:56:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:09,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:09,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:11,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:11,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:11,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:12,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:13,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:14,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:14,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 13:56:14,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 13:56:14,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:56:14,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:14,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:14,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:56:14,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:56:14,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:14,249 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:14,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:14,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:14,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:14,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:14,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:14,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:56:14,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:14,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:14,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:14,281 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 13:56:14,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697500940] [2020-10-13 13:56:14,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:14,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:14,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052337582] [2020-10-13 13:56:14,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:14,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:14,283 INFO L87 Difference]: Start difference. First operand 4882 states and 6838 transitions. Second operand 5 states. [2020-10-13 13:56:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:16,041 INFO L93 Difference]: Finished difference Result 10326 states and 14283 transitions. [2020-10-13 13:56:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:16,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-13 13:56:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:16,057 INFO L225 Difference]: With dead ends: 10326 [2020-10-13 13:56:16,058 INFO L226 Difference]: Without dead ends: 5228 [2020-10-13 13:56:16,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:16,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2020-10-13 13:56:16,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 5226. [2020-10-13 13:56:16,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5226 states. [2020-10-13 13:56:16,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5226 states to 5226 states and 7165 transitions. [2020-10-13 13:56:16,369 INFO L78 Accepts]: Start accepts. Automaton has 5226 states and 7165 transitions. Word has length 162 [2020-10-13 13:56:16,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:16,369 INFO L479 AbstractCegarLoop]: Abstraction has 5226 states and 7165 transitions. [2020-10-13 13:56:16,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:16,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5226 states and 7165 transitions. [2020-10-13 13:56:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 13:56:16,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:16,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:16,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:56:16,379 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:16,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:16,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1000467496, now seen corresponding path program 1 times [2020-10-13 13:56:16,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:16,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [582397900] [2020-10-13 13:56:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:16,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:19,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:19,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:21,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:21,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-13 13:56:21,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:56:21,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 13:56:21,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 13:56:21,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 13:56:21,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:21,706 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:21,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:21,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:21,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:21,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:21,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:21,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:56:21,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:21,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:21,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:21,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:21,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:21,743 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 13:56:21,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [582397900] [2020-10-13 13:56:21,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:21,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:21,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672453485] [2020-10-13 13:56:21,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:21,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:21,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:21,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:21,746 INFO L87 Difference]: Start difference. First operand 5226 states and 7165 transitions. Second operand 5 states. [2020-10-13 13:56:23,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:23,266 INFO L93 Difference]: Finished difference Result 9969 states and 13761 transitions. [2020-10-13 13:56:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:23,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-13 13:56:23,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:23,288 INFO L225 Difference]: With dead ends: 9969 [2020-10-13 13:56:23,288 INFO L226 Difference]: Without dead ends: 5005 [2020-10-13 13:56:23,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2020-10-13 13:56:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 4994. [2020-10-13 13:56:23,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4994 states. [2020-10-13 13:56:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4994 states to 4994 states and 6887 transitions. [2020-10-13 13:56:23,537 INFO L78 Accepts]: Start accepts. Automaton has 4994 states and 6887 transitions. Word has length 162 [2020-10-13 13:56:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:23,538 INFO L479 AbstractCegarLoop]: Abstraction has 4994 states and 6887 transitions. [2020-10-13 13:56:23,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 4994 states and 6887 transitions. [2020-10-13 13:56:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 13:56:23,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:23,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:23,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:56:23,546 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1743780148, now seen corresponding path program 1 times [2020-10-13 13:56:23,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:23,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40412293] [2020-10-13 13:56:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:23,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:23,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:23,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:23,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:23,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:23,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:23,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:24,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:24,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:24,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:25,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:25,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:26,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:26,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:27,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:28,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:28,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 13:56:28,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 13:56:28,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:56:28,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:28,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:56:28,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 13:56:28,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:56:28,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:28,798 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:28,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:28,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:28,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:28,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:28,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:56:28,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:28,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:28,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:28,838 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 13:56:28,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40412293] [2020-10-13 13:56:28,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:28,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:56:28,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014016399] [2020-10-13 13:56:28,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:56:28,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:56:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:28,841 INFO L87 Difference]: Start difference. First operand 4994 states and 6887 transitions. Second operand 4 states. [2020-10-13 13:56:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:30,993 INFO L93 Difference]: Finished difference Result 11882 states and 16369 transitions. [2020-10-13 13:56:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:56:30,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2020-10-13 13:56:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:31,029 INFO L225 Difference]: With dead ends: 11882 [2020-10-13 13:56:31,029 INFO L226 Difference]: Without dead ends: 9849 [2020-10-13 13:56:31,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:56:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9849 states. [2020-10-13 13:56:31,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9849 to 5006. [2020-10-13 13:56:31,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5006 states. [2020-10-13 13:56:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 6899 transitions. [2020-10-13 13:56:31,416 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 6899 transitions. Word has length 163 [2020-10-13 13:56:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:31,416 INFO L479 AbstractCegarLoop]: Abstraction has 5006 states and 6899 transitions. [2020-10-13 13:56:31,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:56:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 6899 transitions. [2020-10-13 13:56:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 13:56:31,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:31,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:31,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:56:31,424 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 245580119, now seen corresponding path program 1 times [2020-10-13 13:56:31,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:31,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420362684] [2020-10-13 13:56:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:31,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:31,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:31,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:31,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:34,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:34,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:34,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:35,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:36,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:36,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 13:56:36,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 13:56:36,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 13:56:36,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:36,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:36,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:56:36,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 13:56:36,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:36,739 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:36,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:36,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:36,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:36,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:36,771 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 13:56:36,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420362684] [2020-10-13 13:56:36,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:36,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:36,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778399343] [2020-10-13 13:56:36,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:36,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:36,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:36,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:36,772 INFO L87 Difference]: Start difference. First operand 5006 states and 6899 transitions. Second operand 5 states. [2020-10-13 13:56:38,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:38,910 INFO L93 Difference]: Finished difference Result 13575 states and 18629 transitions. [2020-10-13 13:56:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:38,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-13 13:56:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:38,935 INFO L225 Difference]: With dead ends: 13575 [2020-10-13 13:56:38,935 INFO L226 Difference]: Without dead ends: 9608 [2020-10-13 13:56:38,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2020-10-13 13:56:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 5044. [2020-10-13 13:56:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5044 states. [2020-10-13 13:56:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5044 states to 5044 states and 6938 transitions. [2020-10-13 13:56:39,367 INFO L78 Accepts]: Start accepts. Automaton has 5044 states and 6938 transitions. Word has length 164 [2020-10-13 13:56:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:39,367 INFO L479 AbstractCegarLoop]: Abstraction has 5044 states and 6938 transitions. [2020-10-13 13:56:39,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 5044 states and 6938 transitions. [2020-10-13 13:56:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-13 13:56:39,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:39,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:39,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:56:39,373 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:39,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1875844887, now seen corresponding path program 1 times [2020-10-13 13:56:39,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:39,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889354673] [2020-10-13 13:56:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:39,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:40,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:41,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:41,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:42,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:44,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:44,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 13:56:44,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 13:56:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 13:56:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 13:56:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 13:56:44,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:44,685 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:44,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:44,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:44,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:44,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:56:44,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:44,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:44,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:44,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:44,718 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 13:56:44,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889354673] [2020-10-13 13:56:44,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:44,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:44,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902329607] [2020-10-13 13:56:44,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:44,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:44,721 INFO L87 Difference]: Start difference. First operand 5044 states and 6938 transitions. Second operand 5 states. [2020-10-13 13:56:46,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:46,208 INFO L93 Difference]: Finished difference Result 6351 states and 8739 transitions. [2020-10-13 13:56:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:46,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-13 13:56:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:46,220 INFO L225 Difference]: With dead ends: 6351 [2020-10-13 13:56:46,220 INFO L226 Difference]: Without dead ends: 4294 [2020-10-13 13:56:46,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-10-13 13:56:46,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4274. [2020-10-13 13:56:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4274 states. [2020-10-13 13:56:46,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 5903 transitions. [2020-10-13 13:56:46,669 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 5903 transitions. Word has length 164 [2020-10-13 13:56:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:46,669 INFO L479 AbstractCegarLoop]: Abstraction has 4274 states and 5903 transitions. [2020-10-13 13:56:46,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:46,670 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 5903 transitions. [2020-10-13 13:56:46,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 13:56:46,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:46,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:56:46,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:56:46,676 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:46,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:46,676 INFO L82 PathProgramCache]: Analyzing trace with hash -862960803, now seen corresponding path program 1 times [2020-10-13 13:56:46,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:46,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292319760] [2020-10-13 13:56:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:46,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:46,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:46,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:46,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:46,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:49,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:49,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:51,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 13:56:51,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:51,983 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:56:51,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:56:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:52,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:56:52,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:56:52,070 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 13:56:52,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292319760] [2020-10-13 13:56:52,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:56:52,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:56:52,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310751101] [2020-10-13 13:56:52,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:56:52,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:56:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:56:52,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:56:52,072 INFO L87 Difference]: Start difference. First operand 4274 states and 5903 transitions. Second operand 5 states. [2020-10-13 13:56:54,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:56:54,545 INFO L93 Difference]: Finished difference Result 9756 states and 13561 transitions. [2020-10-13 13:56:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:56:54,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-13 13:56:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:56:54,558 INFO L225 Difference]: With dead ends: 9756 [2020-10-13 13:56:54,558 INFO L226 Difference]: Without dead ends: 5892 [2020-10-13 13:56:54,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:56:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2020-10-13 13:56:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5890. [2020-10-13 13:56:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5890 states. [2020-10-13 13:56:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5890 states to 5890 states and 8039 transitions. [2020-10-13 13:56:55,160 INFO L78 Accepts]: Start accepts. Automaton has 5890 states and 8039 transitions. Word has length 168 [2020-10-13 13:56:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:56:55,160 INFO L479 AbstractCegarLoop]: Abstraction has 5890 states and 8039 transitions. [2020-10-13 13:56:55,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:56:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 5890 states and 8039 transitions. [2020-10-13 13:56:55,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 13:56:55,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:56:55,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:56:55,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:56:55,165 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:56:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:56:55,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1246346401, now seen corresponding path program 1 times [2020-10-13 13:56:55,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:56:55,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369912122] [2020-10-13 13:56:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:56:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:56:55,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:55,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:59,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:56:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:57:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 13:57:00,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 13:57:00,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:00,435 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:57:00,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:00,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:00,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:00,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:57:00,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:00,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:00,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:00,471 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 13:57:00,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369912122] [2020-10-13 13:57:00,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:00,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:57:00,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906353975] [2020-10-13 13:57:00,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:57:00,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:57:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:00,473 INFO L87 Difference]: Start difference. First operand 5890 states and 8039 transitions. Second operand 4 states. [2020-10-13 13:57:00,702 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:57:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:02,866 INFO L93 Difference]: Finished difference Result 15262 states and 21219 transitions. [2020-10-13 13:57:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:02,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2020-10-13 13:57:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:02,885 INFO L225 Difference]: With dead ends: 15262 [2020-10-13 13:57:02,885 INFO L226 Difference]: Without dead ends: 10952 [2020-10-13 13:57:02,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10952 states. [2020-10-13 13:57:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10952 to 10950. [2020-10-13 13:57:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10950 states. [2020-10-13 13:57:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10950 states to 10950 states and 14977 transitions. [2020-10-13 13:57:03,778 INFO L78 Accepts]: Start accepts. Automaton has 10950 states and 14977 transitions. Word has length 170 [2020-10-13 13:57:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:03,779 INFO L479 AbstractCegarLoop]: Abstraction has 10950 states and 14977 transitions. [2020-10-13 13:57:03,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 10950 states and 14977 transitions. [2020-10-13 13:57:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 13:57:03,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:03,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:57:03,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:57:03,788 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1128680484, now seen corresponding path program 1 times [2020-10-13 13:57:03,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:03,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58559695] [2020-10-13 13:57:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:03,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:03,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:04,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:04,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:04,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:06,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:08,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:08,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 13:57:08,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 13:57:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:57:08,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:57:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 13:57:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 13:57:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:09,054 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:57:09,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:09,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:09,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:09,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:09,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:57:09,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:09,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:09,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:09,094 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 13:57:09,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58559695] [2020-10-13 13:57:09,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:09,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:57:09,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022318056] [2020-10-13 13:57:09,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:57:09,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:09,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:57:09,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:09,096 INFO L87 Difference]: Start difference. First operand 10950 states and 14977 transitions. Second operand 4 states. [2020-10-13 13:57:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:12,752 INFO L93 Difference]: Finished difference Result 30230 states and 41521 transitions. [2020-10-13 13:57:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:57:12,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2020-10-13 13:57:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:12,782 INFO L225 Difference]: With dead ends: 30230 [2020-10-13 13:57:12,783 INFO L226 Difference]: Without dead ends: 20692 [2020-10-13 13:57:12,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20692 states. [2020-10-13 13:57:14,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20692 to 20690. [2020-10-13 13:57:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20690 states. [2020-10-13 13:57:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20690 states to 20690 states and 27971 transitions. [2020-10-13 13:57:14,319 INFO L78 Accepts]: Start accepts. Automaton has 20690 states and 27971 transitions. Word has length 170 [2020-10-13 13:57:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:14,319 INFO L479 AbstractCegarLoop]: Abstraction has 20690 states and 27971 transitions. [2020-10-13 13:57:14,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 20690 states and 27971 transitions. [2020-10-13 13:57:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 13:57:14,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:14,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:57:14,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:57:14,335 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:14,335 INFO L82 PathProgramCache]: Analyzing trace with hash -273272775, now seen corresponding path program 1 times [2020-10-13 13:57:14,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:14,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582851029] [2020-10-13 13:57:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:14,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:15,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:15,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:19,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:19,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 13:57:19,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:57:19,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 13:57:19,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:19,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:57:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:57:19,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 13:57:19,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:19,664 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:57:19,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:19,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:19,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:19,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:19,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:19,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:57:19,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:19,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:19,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:19,695 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 13:57:19,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582851029] [2020-10-13 13:57:19,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:19,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:57:19,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112617742] [2020-10-13 13:57:19,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:57:19,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:19,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:57:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:19,697 INFO L87 Difference]: Start difference. First operand 20690 states and 27971 transitions. Second operand 5 states. [2020-10-13 13:57:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:23,664 INFO L93 Difference]: Finished difference Result 46342 states and 62775 transitions. [2020-10-13 13:57:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:23,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-13 13:57:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:23,704 INFO L225 Difference]: With dead ends: 46342 [2020-10-13 13:57:23,704 INFO L226 Difference]: Without dead ends: 31118 [2020-10-13 13:57:23,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31118 states. [2020-10-13 13:57:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31118 to 20678. [2020-10-13 13:57:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20678 states. [2020-10-13 13:57:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20678 states to 20678 states and 27953 transitions. [2020-10-13 13:57:26,210 INFO L78 Accepts]: Start accepts. Automaton has 20678 states and 27953 transitions. Word has length 170 [2020-10-13 13:57:26,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:26,210 INFO L479 AbstractCegarLoop]: Abstraction has 20678 states and 27953 transitions. [2020-10-13 13:57:26,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:57:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 20678 states and 27953 transitions. [2020-10-13 13:57:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 13:57:26,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:26,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:57:26,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:57:26,227 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1619508940, now seen corresponding path program 1 times [2020-10-13 13:57:26,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:26,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968284989] [2020-10-13 13:57:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:26,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:26,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:26,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:26,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:28,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:31,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:31,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 13:57:31,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:57:31,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 13:57:31,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:31,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:57:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 13:57:31,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 13:57:31,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:31,513 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:57:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:31,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:31,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:31,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:31,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:31,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:57:31,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:31,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:31,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:31,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:31,545 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 13:57:31,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968284989] [2020-10-13 13:57:31,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:31,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:57:31,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969897375] [2020-10-13 13:57:31,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:57:31,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:31,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:57:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:31,548 INFO L87 Difference]: Start difference. First operand 20678 states and 27953 transitions. Second operand 4 states. [2020-10-13 13:57:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:34,867 INFO L93 Difference]: Finished difference Result 33771 states and 45626 transitions. [2020-10-13 13:57:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:57:34,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-10-13 13:57:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:34,895 INFO L225 Difference]: With dead ends: 33771 [2020-10-13 13:57:34,895 INFO L226 Difference]: Without dead ends: 26345 [2020-10-13 13:57:34,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:57:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26345 states. [2020-10-13 13:57:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26345 to 20557. [2020-10-13 13:57:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20557 states. [2020-10-13 13:57:36,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20557 states to 20557 states and 27815 transitions. [2020-10-13 13:57:36,459 INFO L78 Accepts]: Start accepts. Automaton has 20557 states and 27815 transitions. Word has length 171 [2020-10-13 13:57:36,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:36,460 INFO L479 AbstractCegarLoop]: Abstraction has 20557 states and 27815 transitions. [2020-10-13 13:57:36,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:57:36,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20557 states and 27815 transitions. [2020-10-13 13:57:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 13:57:36,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:36,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:57:36,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:57:36,474 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:36,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1581857918, now seen corresponding path program 1 times [2020-10-13 13:57:36,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:36,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504391173] [2020-10-13 13:57:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:36,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:36,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:36,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:36,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:36,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:36,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:37,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:37,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:40,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:40,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:41,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:41,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-13 13:57:41,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:57:41,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:57:41,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:57:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 13:57:41,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 13:57:41,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:41,774 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:57:41,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:41,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:41,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:41,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:41,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:41,809 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 13:57:41,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504391173] [2020-10-13 13:57:41,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:41,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:57:41,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372683098] [2020-10-13 13:57:41,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:57:41,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:41,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:57:41,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:41,811 INFO L87 Difference]: Start difference. First operand 20557 states and 27815 transitions. Second operand 5 states. [2020-10-13 13:57:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:44,484 INFO L93 Difference]: Finished difference Result 31919 states and 43279 transitions. [2020-10-13 13:57:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:44,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2020-10-13 13:57:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:44,501 INFO L225 Difference]: With dead ends: 31919 [2020-10-13 13:57:44,501 INFO L226 Difference]: Without dead ends: 16893 [2020-10-13 13:57:44,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:57:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2020-10-13 13:57:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16887. [2020-10-13 13:57:45,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16887 states. [2020-10-13 13:57:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16887 states to 16887 states and 22783 transitions. [2020-10-13 13:57:45,987 INFO L78 Accepts]: Start accepts. Automaton has 16887 states and 22783 transitions. Word has length 172 [2020-10-13 13:57:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:45,988 INFO L479 AbstractCegarLoop]: Abstraction has 16887 states and 22783 transitions. [2020-10-13 13:57:45,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:57:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 16887 states and 22783 transitions. [2020-10-13 13:57:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 13:57:45,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:45,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:57:45,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:57:45,997 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:45,998 INFO L82 PathProgramCache]: Analyzing trace with hash -156841065, now seen corresponding path program 1 times [2020-10-13 13:57:45,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:45,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926102834] [2020-10-13 13:57:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:46,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:46,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:47,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:47,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:47,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:48,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:50,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:50,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:51,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:51,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 13:57:51,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 13:57:51,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 13:57:51,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:51,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:57:51,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:57:51,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 13:57:51,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:51,285 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:57:51,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:57:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:51,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:51,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:57:51,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:57:51,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:57:51,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:57:51,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:57:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:57:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:57:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:57:51,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:57:51,328 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 13:57:51,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926102834] [2020-10-13 13:57:51,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:57:51,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:57:51,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822318460] [2020-10-13 13:57:51,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:57:51,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:57:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:57:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:57:51,331 INFO L87 Difference]: Start difference. First operand 16887 states and 22783 transitions. Second operand 5 states. [2020-10-13 13:57:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:57:54,716 INFO L93 Difference]: Finished difference Result 22677 states and 30605 transitions. [2020-10-13 13:57:54,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:57:54,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 176 [2020-10-13 13:57:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:57:54,735 INFO L225 Difference]: With dead ends: 22677 [2020-10-13 13:57:54,735 INFO L226 Difference]: Without dead ends: 16889 [2020-10-13 13:57:54,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:57:54,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16889 states. [2020-10-13 13:57:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16889 to 16795. [2020-10-13 13:57:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16795 states. [2020-10-13 13:57:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16795 states to 16795 states and 22661 transitions. [2020-10-13 13:57:56,233 INFO L78 Accepts]: Start accepts. Automaton has 16795 states and 22661 transitions. Word has length 176 [2020-10-13 13:57:56,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:57:56,233 INFO L479 AbstractCegarLoop]: Abstraction has 16795 states and 22661 transitions. [2020-10-13 13:57:56,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:57:56,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16795 states and 22661 transitions. [2020-10-13 13:57:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-13 13:57:56,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:57:56,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:57:56,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:57:56,242 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:57:56,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:57:56,242 INFO L82 PathProgramCache]: Analyzing trace with hash -457560947, now seen corresponding path program 1 times [2020-10-13 13:57:56,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:57:56,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463566087] [2020-10-13 13:57:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:57:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:57:56,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:56,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:56,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:56,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:56,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:56,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:57,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:58,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:58,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:59,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:57:59,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:00,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:01,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:01,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 13:58:01,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 13:58:01,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:58:01,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:58:01,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:58:01,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 13:58:01,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:01,562 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:58:01,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:58:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:01,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:01,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:01,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:58:01,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:58:01,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:58:01,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:58:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:58:01,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:58:01,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:01,611 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 13:58:01,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463566087] [2020-10-13 13:58:01,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:58:01,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:58:01,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71627845] [2020-10-13 13:58:01,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:58:01,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:58:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:58:01,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:58:01,613 INFO L87 Difference]: Start difference. First operand 16795 states and 22661 transitions. Second operand 5 states. [2020-10-13 13:58:04,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:58:04,725 INFO L93 Difference]: Finished difference Result 26386 states and 35778 transitions. [2020-10-13 13:58:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:58:04,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 178 [2020-10-13 13:58:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:58:04,742 INFO L225 Difference]: With dead ends: 26386 [2020-10-13 13:58:04,742 INFO L226 Difference]: Without dead ends: 15064 [2020-10-13 13:58:04,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:58:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15064 states. [2020-10-13 13:58:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15064 to 14870. [2020-10-13 13:58:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14870 states. [2020-10-13 13:58:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14870 states to 14870 states and 19999 transitions. [2020-10-13 13:58:06,182 INFO L78 Accepts]: Start accepts. Automaton has 14870 states and 19999 transitions. Word has length 178 [2020-10-13 13:58:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:58:06,183 INFO L479 AbstractCegarLoop]: Abstraction has 14870 states and 19999 transitions. [2020-10-13 13:58:06,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:58:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 14870 states and 19999 transitions. [2020-10-13 13:58:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 13:58:06,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:58:06,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:06,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 13:58:06,191 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:58:06,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:58:06,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1788270855, now seen corresponding path program 1 times [2020-10-13 13:58:06,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:58:06,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899661081] [2020-10-13 13:58:06,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:58:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:06,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:06,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:06,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:06,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:06,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:06,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:09,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:09,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:11,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 13:58:11,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 13:58:11,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:11,486 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:58:11,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:58:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:11,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:11,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:58:11,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:58:11,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:58:11,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:58:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:58:11,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:58:11,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:11,522 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 13:58:11,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899661081] [2020-10-13 13:58:11,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:58:11,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:58:11,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851990132] [2020-10-13 13:58:11,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:58:11,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:58:11,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:58:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:58:11,524 INFO L87 Difference]: Start difference. First operand 14870 states and 19999 transitions. Second operand 4 states. [2020-10-13 13:58:11,757 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:58:15,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:58:15,732 INFO L93 Difference]: Finished difference Result 39180 states and 53461 transitions. [2020-10-13 13:58:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:58:15,734 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 180 [2020-10-13 13:58:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:58:15,764 INFO L225 Difference]: With dead ends: 39180 [2020-10-13 13:58:15,764 INFO L226 Difference]: Without dead ends: 28176 [2020-10-13 13:58:15,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:58:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28176 states. [2020-10-13 13:58:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28176 to 28174. [2020-10-13 13:58:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28174 states. [2020-10-13 13:58:18,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28174 states to 28174 states and 37783 transitions. [2020-10-13 13:58:18,333 INFO L78 Accepts]: Start accepts. Automaton has 28174 states and 37783 transitions. Word has length 180 [2020-10-13 13:58:18,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:58:18,334 INFO L479 AbstractCegarLoop]: Abstraction has 28174 states and 37783 transitions. [2020-10-13 13:58:18,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:58:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 28174 states and 37783 transitions. [2020-10-13 13:58:18,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 13:58:18,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:58:18,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:58:18,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 13:58:18,351 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:58:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:58:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -336770676, now seen corresponding path program 1 times [2020-10-13 13:58:18,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:58:18,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376845988] [2020-10-13 13:58:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:58:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:18,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:18,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:18,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:18,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:18,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:23,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:23,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-13 13:58:23,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:58:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:58:23,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 13:58:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-13 13:58:23,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-13 13:58:23,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:23,957 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 13:58:23,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:58:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:58:23,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:58:23,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:58:23,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:58:23,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:58:23,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:58:23,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:58:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:58:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:58:23,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:58:23,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:58:24,015 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 13:58:24,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376845988] [2020-10-13 13:58:24,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:58:24,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 13:58:24,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589686472] [2020-10-13 13:58:24,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 13:58:24,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:58:24,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 13:58:24,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 13:58:24,017 INFO L87 Difference]: Start difference. First operand 28174 states and 37783 transitions. Second operand 12 states. [2020-10-13 13:58:24,652 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 190