/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 00:01:28,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 00:01:28,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 00:01:28,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 00:01:28,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 00:01:28,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 00:01:28,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 00:01:28,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 00:01:28,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 00:01:28,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 00:01:28,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 00:01:28,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 00:01:28,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 00:01:28,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 00:01:28,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 00:01:28,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 00:01:28,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 00:01:28,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 00:01:28,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 00:01:28,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 00:01:28,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 00:01:28,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 00:01:28,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 00:01:28,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 00:01:28,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 00:01:28,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 00:01:28,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 00:01:28,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 00:01:28,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 00:01:28,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 00:01:28,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 00:01:28,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 00:01:28,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 00:01:28,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 00:01:28,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 00:01:28,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 00:01:28,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 00:01:28,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 00:01:28,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 00:01:28,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 00:01:28,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 00:01:28,379 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 [2020-10-15 00:01:28,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 00:01:28,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 00:01:28,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 00:01:28,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 00:01:28,403 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 00:01:28,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 00:01:28,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 00:01:28,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 00:01:28,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 00:01:28,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 00:01:28,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 00:01:28,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 00:01:28,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 00:01:28,405 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 00:01:28,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 00:01:28,405 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 00:01:28,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 00:01:28,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 00:01:28,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 00:01:28,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 00:01:28,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 00:01:28,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 00:01:28,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 00:01:28,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 00:01:28,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 00:01:28,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 00:01:28,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 00:01:28,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 00:01:28,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 00:01:28,408 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 00:01:28,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 00:01:28,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 00:01:28,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 00:01:28,733 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 00:01:28,733 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 00:01:28,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2020-10-15 00:01:28,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa172bfb0/282baeb77cf94f31961e72ae4433efdb/FLAG9be3da2b7 [2020-10-15 00:01:29,231 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 00:01:29,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2020-10-15 00:01:29,238 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa172bfb0/282baeb77cf94f31961e72ae4433efdb/FLAG9be3da2b7 [2020-10-15 00:01:29,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aa172bfb0/282baeb77cf94f31961e72ae4433efdb [2020-10-15 00:01:29,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 00:01:29,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 00:01:29,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 00:01:29,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 00:01:29,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 00:01:29,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:29,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ad693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29, skipping insertion in model container [2020-10-15 00:01:29,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:29,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 00:01:29,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 00:01:29,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:01:29,864 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 00:01:29,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 00:01:29,894 INFO L208 MainTranslator]: Completed translation [2020-10-15 00:01:29,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29 WrapperNode [2020-10-15 00:01:29,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 00:01:29,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 00:01:29,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 00:01:29,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 00:01:29,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:29,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:29,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:29,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:30,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:30,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:30,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (1/1) ... [2020-10-15 00:01:30,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 00:01:30,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 00:01:30,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 00:01:30,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 00:01:30,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (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 [2020-10-15 00:01:30,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 00:01:30,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 00:01:30,092 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-15 00:01:30,092 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 00:01:30,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 00:01:30,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-15 00:01:30,093 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 00:01:30,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 00:01:30,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 00:01:30,267 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 00:01:30,267 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-15 00:01:30,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:30 BoogieIcfgContainer [2020-10-15 00:01:30,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 00:01:30,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 00:01:30,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 00:01:30,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 00:01:30,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:29" (1/3) ... [2020-10-15 00:01:30,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a51b8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:30, skipping insertion in model container [2020-10-15 00:01:30,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:29" (2/3) ... [2020-10-15 00:01:30,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a51b8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:30, skipping insertion in model container [2020-10-15 00:01:30,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:30" (3/3) ... [2020-10-15 00:01:30,279 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2020-10-15 00:01:30,289 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 00:01:30,296 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 00:01:30,310 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 00:01:30,332 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 00:01:30,332 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 00:01:30,332 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 00:01:30,333 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 00:01:30,333 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 00:01:30,333 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 00:01:30,333 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 00:01:30,333 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 00:01:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-15 00:01:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:01:30,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:30,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:30,355 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-15 00:01:30,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:30,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517772756] [2020-10-15 00:01:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:30,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:01:30,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:30,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-15 00:01:30,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 00:01:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:30,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 00:01:30,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:30,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:30,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:30,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:30,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 00:01:30,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:30,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:30,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:30,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517772756] [2020-10-15 00:01:30,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:01:30,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 00:01:30,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167174489] [2020-10-15 00:01:30,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-15 00:01:30,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-15 00:01:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-15 00:01:30,582 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-15 00:01:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:30,601 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-15 00:01:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-15 00:01:30,602 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-15 00:01:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:30,610 INFO L225 Difference]: With dead ends: 32 [2020-10-15 00:01:30,610 INFO L226 Difference]: Without dead ends: 13 [2020-10-15 00:01:30,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-15 00:01:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-15 00:01:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-15 00:01:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-15 00:01:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-15 00:01:30,648 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-15 00:01:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:30,649 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-15 00:01:30,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-15 00:01:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-15 00:01:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 00:01:30,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:30,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:30,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 00:01:30,651 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:30,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:30,651 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-10-15 00:01:30,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:30,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913699571] [2020-10-15 00:01:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:30,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 00:01:30,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:30,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-15 00:01:30,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 00:01:30,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:30,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 00:01:30,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:30,944 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2020-10-15 00:01:30,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:30,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:30,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:30,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:30,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:30,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-15 00:01:30,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:30,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:30,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:30,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913699571] [2020-10-15 00:01:30,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 00:01:30,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 00:01:30,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530207563] [2020-10-15 00:01:30,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 00:01:30,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 00:01:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:01:30,984 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-10-15 00:01:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:31,025 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-15 00:01:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 00:01:31,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-15 00:01:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:31,027 INFO L225 Difference]: With dead ends: 21 [2020-10-15 00:01:31,027 INFO L226 Difference]: Without dead ends: 16 [2020-10-15 00:01:31,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 00:01:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-15 00:01:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-10-15 00:01:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-15 00:01:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-15 00:01:31,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-15 00:01:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:31,034 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-15 00:01:31,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 00:01:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-15 00:01:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 00:01:31,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:31,035 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:31,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 00:01:31,036 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:31,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:31,036 INFO L82 PathProgramCache]: Analyzing trace with hash 743821333, now seen corresponding path program 1 times [2020-10-15 00:01:31,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:31,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9553426] [2020-10-15 00:01:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 00:01:31,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:31,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-15 00:01:31,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 00:01:31,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:31,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 00:01:31,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:31,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:31,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:01:31,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:31,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:31,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:31,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9553426] [2020-10-15 00:01:31,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:31,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-15 00:01:31,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430982934] [2020-10-15 00:01:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 00:01:31,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 00:01:31,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:01:31,312 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2020-10-15 00:01:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:31,354 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-10-15 00:01:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 00:01:31,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-15 00:01:31,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:31,356 INFO L225 Difference]: With dead ends: 24 [2020-10-15 00:01:31,357 INFO L226 Difference]: Without dead ends: 19 [2020-10-15 00:01:31,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 00:01:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-15 00:01:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-15 00:01:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-15 00:01:31,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-15 00:01:31,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2020-10-15 00:01:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:31,364 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-15 00:01:31,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 00:01:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-15 00:01:31,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 00:01:31,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:31,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:31,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 00:01:31,365 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:31,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:31,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1182180650, now seen corresponding path program 2 times [2020-10-15 00:01:31,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:31,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654061295] [2020-10-15 00:01:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-15 00:01:31,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:31,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 273 [2020-10-15 00:01:31,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:01:31,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:31,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:01:31,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:31,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:31,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:31,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:31,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:31,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:31,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:31,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654061295] [2020-10-15 00:01:31,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:31,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:01:31,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312480521] [2020-10-15 00:01:31,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:01:31,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:31,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:01:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:01:31,790 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-15 00:01:31,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:31,859 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-10-15 00:01:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 00:01:31,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-15 00:01:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:31,860 INFO L225 Difference]: With dead ends: 28 [2020-10-15 00:01:31,861 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 00:01:31,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 00:01:31,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 00:01:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-15 00:01:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-15 00:01:31,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-10-15 00:01:31,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2020-10-15 00:01:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:31,867 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-10-15 00:01:31,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:01:31,868 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-10-15 00:01:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:01:31,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:31,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:31,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 00:01:31,869 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:31,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:31,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2055818357, now seen corresponding path program 3 times [2020-10-15 00:01:31,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:31,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962250360] [2020-10-15 00:01:31,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:01:32,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:32,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-15 00:01:32,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:01:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:32,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 00:01:32,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:32,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:32,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:32,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:32,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:32,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:32,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:32,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962250360] [2020-10-15 00:01:32,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:32,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:01:32,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955197021] [2020-10-15 00:01:32,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:01:32,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:32,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:01:32,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:01:32,373 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-10-15 00:01:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:32,411 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-15 00:01:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:01:32,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-15 00:01:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:32,413 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:01:32,413 INFO L226 Difference]: Without dead ends: 22 [2020-10-15 00:01:32,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:01:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-15 00:01:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-15 00:01:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-15 00:01:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-15 00:01:32,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-10-15 00:01:32,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:32,420 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-15 00:01:32,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:01:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-15 00:01:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 00:01:32,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:32,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:32,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 00:01:32,422 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 1 times [2020-10-15 00:01:32,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:32,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293818928] [2020-10-15 00:01:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 00:01:32,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:32,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-15 00:01:32,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 00:01:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:32,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-15 00:01:32,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:32,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:32,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:32,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:32,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:32,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:32,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:32,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:32,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:32,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:01:32,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293818928] [2020-10-15 00:01:32,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:32,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 00:01:32,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803124258] [2020-10-15 00:01:32,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 00:01:32,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 00:01:32,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 00:01:32,704 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-10-15 00:01:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:32,763 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-15 00:01:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 00:01:32,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-15 00:01:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:32,764 INFO L225 Difference]: With dead ends: 30 [2020-10-15 00:01:32,764 INFO L226 Difference]: Without dead ends: 25 [2020-10-15 00:01:32,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 00:01:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-15 00:01:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-15 00:01:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 00:01:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-10-15 00:01:32,771 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-10-15 00:01:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:32,772 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-10-15 00:01:32,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 00:01:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-10-15 00:01:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:01:32,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:32,773 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:32,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 00:01:32,773 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1682133644, now seen corresponding path program 1 times [2020-10-15 00:01:32,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:32,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242866098] [2020-10-15 00:01:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:32,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:32,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:33,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:01:33,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 00:01:33,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-10-15 00:01:33,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:33,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:01:33,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:33,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:01:33,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:33,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:33,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:33,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:33,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:33,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:33,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:33,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:33,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:33,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:33,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:33,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:01:33,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242866098] [2020-10-15 00:01:33,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:33,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:01:33,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946420720] [2020-10-15 00:01:33,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:01:33,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:33,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:01:33,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:33,544 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 9 states. [2020-10-15 00:01:33,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:33,638 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-15 00:01:33,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:01:33,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-15 00:01:33,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:33,640 INFO L225 Difference]: With dead ends: 35 [2020-10-15 00:01:33,640 INFO L226 Difference]: Without dead ends: 30 [2020-10-15 00:01:33,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-15 00:01:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-10-15 00:01:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 00:01:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-15 00:01:33,647 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-10-15 00:01:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:33,647 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-15 00:01:33,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:01:33,648 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-15 00:01:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:01:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:33,649 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:33,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 00:01:33,649 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1392210665, now seen corresponding path program 2 times [2020-10-15 00:01:33,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:33,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233224298] [2020-10-15 00:01:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:33,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:33,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:01:34,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 00:01:34,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 882 [2020-10-15 00:01:34,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:01:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:34,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 00:01:34,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:34,753 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-15 00:01:34,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:34,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:34,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:01:34,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:34,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:34,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:01:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233224298] [2020-10-15 00:01:35,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:35,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:01:35,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433568625] [2020-10-15 00:01:35,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:01:35,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:35,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:01:35,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:01:35,009 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 11 states. [2020-10-15 00:01:35,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:35,277 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-15 00:01:35,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:01:35,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-10-15 00:01:35,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:35,281 INFO L225 Difference]: With dead ends: 46 [2020-10-15 00:01:35,281 INFO L226 Difference]: Without dead ends: 33 [2020-10-15 00:01:35,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:01:35,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-15 00:01:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-15 00:01:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-15 00:01:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-15 00:01:35,290 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-15 00:01:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:35,291 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-15 00:01:35,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:01:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-15 00:01:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:01:35,292 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:35,292 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:35,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 00:01:35,293 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1475975532, now seen corresponding path program 3 times [2020-10-15 00:01:35,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:35,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097650181] [2020-10-15 00:01:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:35,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:37,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:37,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:01:37,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 00:01:37,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1889 [2020-10-15 00:01:37,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:37,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:37,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:01:37,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:37,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:01:37,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:37,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:37,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:37,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:37,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:37,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:37,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:37,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:37,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:37,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:37,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:37,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:01:37,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097650181] [2020-10-15 00:01:37,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:37,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:01:37,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219749043] [2020-10-15 00:01:37,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:01:37,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:37,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:01:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:01:37,445 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 8 states. [2020-10-15 00:01:43,929 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-15 00:01:46,102 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-15 00:01:48,489 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2020-10-15 00:01:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:48,848 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-15 00:01:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:01:48,848 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-15 00:01:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:48,849 INFO L225 Difference]: With dead ends: 44 [2020-10-15 00:01:48,849 INFO L226 Difference]: Without dead ends: 39 [2020-10-15 00:01:48,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=92, Invalid=179, Unknown=1, NotChecked=0, Total=272 [2020-10-15 00:01:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-15 00:01:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-15 00:01:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-15 00:01:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-15 00:01:48,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2020-10-15 00:01:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:48,857 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-15 00:01:48,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:01:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-15 00:01:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-15 00:01:48,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:48,858 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:48,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 00:01:48,859 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1539129353, now seen corresponding path program 4 times [2020-10-15 00:01:48,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:48,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338863645] [2020-10-15 00:01:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:48,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:48,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:49,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:51,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 00:01:51,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 00:01:51,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2580 [2020-10-15 00:01:51,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:51,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:51,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:01:51,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:51,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:01:51,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:51,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:51,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:51,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:51,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:51,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:51,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:51,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:51,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:51,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:01:51,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338863645] [2020-10-15 00:01:51,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:51,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:01:51,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177508662] [2020-10-15 00:01:51,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:01:51,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:01:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:51,720 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-10-15 00:01:54,428 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-15 00:01:54,840 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2020-10-15 00:01:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:57,232 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-15 00:01:57,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:01:57,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-15 00:01:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:57,238 INFO L225 Difference]: With dead ends: 67 [2020-10-15 00:01:57,238 INFO L226 Difference]: Without dead ends: 62 [2020-10-15 00:01:57,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-10-15 00:01:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-15 00:01:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 41. [2020-10-15 00:01:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-15 00:01:57,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-15 00:01:57,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 31 [2020-10-15 00:01:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:57,250 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-15 00:01:57,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:01:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-15 00:01:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-15 00:01:57,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:57,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:57,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 00:01:57,252 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:57,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:57,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1758935116, now seen corresponding path program 5 times [2020-10-15 00:01:57,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:57,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555304057] [2020-10-15 00:01:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:57,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:57,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:00,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:00,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:00,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-15 00:02:00,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 00:02:00,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3273 [2020-10-15 00:02:00,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:00,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:02:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:00,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-15 00:02:00,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:02,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:02,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:02,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:02,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:02,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:02,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 82 refuted. 3 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:02:02,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555304057] [2020-10-15 00:02:02,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:02,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:02:02,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457566927] [2020-10-15 00:02:02,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:02:02,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:02,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:02:02,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2020-10-15 00:02:02,930 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 10 states. [2020-10-15 00:02:09,740 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-10-15 00:02:11,772 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-15 00:02:12,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:12,072 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2020-10-15 00:02:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:02:12,073 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-15 00:02:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:12,074 INFO L225 Difference]: With dead ends: 71 [2020-10-15 00:02:12,074 INFO L226 Difference]: Without dead ends: 66 [2020-10-15 00:02:12,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=202, Invalid=446, Unknown=2, NotChecked=0, Total=650 [2020-10-15 00:02:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-15 00:02:12,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 44. [2020-10-15 00:02:12,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-15 00:02:12,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-15 00:02:12,086 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 34 [2020-10-15 00:02:12,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:12,087 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-15 00:02:12,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:02:12,087 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-15 00:02:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-15 00:02:12,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:12,088 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:12,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 00:02:12,089 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:12,089 INFO L82 PathProgramCache]: Analyzing trace with hash -167294249, now seen corresponding path program 6 times [2020-10-15 00:02:12,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:12,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997806528] [2020-10-15 00:02:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:12,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:12,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:14,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:15,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:15,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-15 00:02:15,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 00:02:15,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3557 [2020-10-15 00:02:15,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:15,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:15,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:02:15,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:15,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-15 00:02:15,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:18,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:18,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:18,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:18,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:18,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:18,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:18,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:18,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:18,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:18,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:02:18,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997806528] [2020-10-15 00:02:18,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:18,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:02:18,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135666505] [2020-10-15 00:02:18,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:02:18,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:18,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:02:18,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110 [2020-10-15 00:02:18,065 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 11 states. [2020-10-15 00:02:19,031 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2020-10-15 00:02:19,478 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2020-10-15 00:02:19,757 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-10-15 00:02:20,684 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2020-10-15 00:02:20,919 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2020-10-15 00:02:21,123 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-15 00:02:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:28,067 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-15 00:02:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 00:02:28,072 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-15 00:02:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:28,076 INFO L225 Difference]: With dead ends: 80 [2020-10-15 00:02:28,076 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 00:02:28,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=260, Invalid=609, Unknown=1, NotChecked=0, Total=870 [2020-10-15 00:02:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 00:02:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 47. [2020-10-15 00:02:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-15 00:02:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-15 00:02:28,101 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2020-10-15 00:02:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:28,101 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-15 00:02:28,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:02:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-15 00:02:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-15 00:02:28,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:28,104 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:28,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 00:02:28,105 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:28,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:28,106 INFO L82 PathProgramCache]: Analyzing trace with hash -33173292, now seen corresponding path program 7 times [2020-10-15 00:02:28,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:28,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164964187] [2020-10-15 00:02:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:28,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:28,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:30,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:32,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:02:32,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:32,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-15 00:02:32,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:36,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:36,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:36,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:36,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:36,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:02:36,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:36,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:36,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:36,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:36,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:36,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:02:36,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164964187] [2020-10-15 00:02:36,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:36,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:02:36,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250807161] [2020-10-15 00:02:36,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:02:36,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:02:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=102, Unknown=2, NotChecked=0, Total=132 [2020-10-15 00:02:36,665 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 12 states. [2020-10-15 00:02:37,874 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 32 [2020-10-15 00:02:40,024 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2020-10-15 00:02:41,084 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 33 [2020-10-15 00:02:41,289 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2020-10-15 00:02:41,552 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 28 [2020-10-15 00:02:43,039 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 28 [2020-10-15 00:02:43,616 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-15 00:02:44,661 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 28 [2020-10-15 00:02:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:49,410 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-10-15 00:02:49,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 00:02:49,411 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-10-15 00:02:49,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:49,412 INFO L225 Difference]: With dead ends: 89 [2020-10-15 00:02:49,412 INFO L226 Difference]: Without dead ends: 84 [2020-10-15 00:02:49,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=325, Invalid=794, Unknown=3, NotChecked=0, Total=1122 [2020-10-15 00:02:49,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-15 00:02:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 50. [2020-10-15 00:02:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 00:02:49,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-15 00:02:49,425 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 40 [2020-10-15 00:02:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:49,425 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-15 00:02:49,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:02:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-15 00:02:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-15 00:02:49,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:49,426 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:49,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 00:02:49,427 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1244671415, now seen corresponding path program 8 times [2020-10-15 00:02:49,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:49,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483327651] [2020-10-15 00:02:49,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:49,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:49,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:51,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-15 00:02:52,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-15 00:02:52,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2891 [2020-10-15 00:02:52,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:02:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:52,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-15 00:02:52,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:52,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:52,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:52,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:52,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:52,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:52,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:52,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:52,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:52,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:52,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:52,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:52,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:02:52,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483327651] [2020-10-15 00:02:52,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:52,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:02:52,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564736642] [2020-10-15 00:02:52,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:02:52,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:02:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:02:52,860 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 13 states. [2020-10-15 00:03:02,904 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-15 00:03:03,210 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 24 [2020-10-15 00:03:07,997 WARN L193 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-15 00:03:10,480 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2020-10-15 00:03:19,330 WARN L193 SmtUtils]: Spent 4.55 s on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2020-10-15 00:03:20,217 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-10-15 00:03:25,605 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2020-10-15 00:03:28,249 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-10-15 00:03:42,520 WARN L193 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2020-10-15 00:03:46,308 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-10-15 00:03:51,440 WARN L193 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 53 DAG size of output: 25 [2020-10-15 00:03:54,906 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24 [2020-10-15 00:03:56,186 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2020-10-15 00:04:07,730 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 60 DAG size of output: 25 [2020-10-15 00:04:15,123 WARN L193 SmtUtils]: Spent 5.23 s on a formula simplification. DAG size of input: 66 DAG size of output: 24 [2020-10-15 00:04:19,433 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-15 00:04:26,748 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 73 DAG size of output: 24 [2020-10-15 00:04:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:04:31,540 INFO L93 Difference]: Finished difference Result 156 states and 198 transitions. [2020-10-15 00:04:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 00:04:31,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-15 00:04:31,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:04:31,543 INFO L225 Difference]: With dead ends: 156 [2020-10-15 00:04:31,543 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 00:04:31,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 86.6s TimeCoverageRelationStatistics Valid=371, Invalid=952, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 00:04:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 00:04:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 50. [2020-10-15 00:04:31,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 00:04:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-15 00:04:31,559 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 43 [2020-10-15 00:04:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:04:31,559 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-15 00:04:31,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:04:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-15 00:04:31,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-15 00:04:31,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:04:31,561 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:04:31,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 00:04:31,561 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:04:31,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:04:31,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1073774092, now seen corresponding path program 9 times [2020-10-15 00:04:31,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:04:31,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137554168] [2020-10-15 00:04:31,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:04:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:04:31,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:31,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:32,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:32,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:33,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:36,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:04:36,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:04:36,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-15 00:04:36,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-15 00:04:36,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:18,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:05:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:18,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:18,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:05:18,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:05:18,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:05:18,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:05:18,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:05:18,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:05:18,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:05:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:05:18,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:05:18,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:05:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 179 refuted. 24 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-15 00:05:18,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137554168] [2020-10-15 00:05:18,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:05:18,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:05:18,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519732781] [2020-10-15 00:05:18,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:05:18,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:05:18,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:05:18,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=127, Unknown=20, NotChecked=0, Total=182 [2020-10-15 00:05:18,195 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 14 states. [2020-10-15 00:05:23,555 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 30 [2020-10-15 00:05:28,376 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 97 DAG size of output: 31 [2020-10-15 00:05:31,348 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 30 [2020-10-15 00:05:31,612 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2020-10-15 00:05:32,936 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 31 [2020-10-15 00:05:33,559 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2020-10-15 00:05:34,489 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 26 [2020-10-15 00:05:34,784 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 26 [2020-10-15 00:05:37,604 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 75 DAG size of output: 31 [2020-10-15 00:05:38,078 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 30 [2020-10-15 00:05:40,495 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 26 [2020-10-15 00:05:41,113 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2020-10-15 00:05:42,062 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 30 [2020-10-15 00:05:43,368 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 26 [2020-10-15 00:05:43,835 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2020-10-15 00:05:47,575 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 26 [2020-10-15 00:05:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:05:53,789 INFO L93 Difference]: Finished difference Result 129 states and 162 transitions. [2020-10-15 00:05:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 00:05:53,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2020-10-15 00:05:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:05:53,794 INFO L225 Difference]: With dead ends: 129 [2020-10-15 00:05:53,794 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 00:05:53,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 68.3s TimeCoverageRelationStatistics Valid=479, Invalid=1221, Unknown=22, NotChecked=0, Total=1722 [2020-10-15 00:05:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 00:05:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 56. [2020-10-15 00:05:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-15 00:05:53,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-15 00:05:53,814 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 46 [2020-10-15 00:05:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:05:53,815 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-15 00:05:53,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:05:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-15 00:05:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-15 00:05:53,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:05:53,816 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:05:53,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 00:05:53,817 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:05:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:05:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1780181143, now seen corresponding path program 10 times [2020-10-15 00:05:53,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:05:53,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426560235] [2020-10-15 00:05:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:05:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:05:53,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:53,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:05:54,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking...