/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 --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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:41,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:41,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:41,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:41,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:41,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:41,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:41,196 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:41,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:41,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:41,203 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:41,204 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:41,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:41,207 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:41,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:41,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:41,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:41,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:41,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:41,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:41,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:41,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:41,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:41,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:41,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:41,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:41,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:41,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:41,250 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:41,252 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:41,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:41,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:41,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:41,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:41,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:41,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:41,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:41,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:41,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:41,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:41,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:41,264 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 [2020-09-21 12:25:41,311 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:41,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:41,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:41,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:41,315 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:41,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:41,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:41,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:41,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:41,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:41,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:41,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:41,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:41,318 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:41,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:41,319 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:41,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:41,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:41,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:41,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:41,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:41,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:41,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:41,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:41,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:41,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:41,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:41,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:41,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:41,322 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.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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:25:41,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:41,781 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:41,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:41,789 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:41,789 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:41,791 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-09-21 12:25:41,894 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c143bb07c/cb2ef546c82747369689af688b92a263/FLAGc5090f4b8 [2020-09-21 12:25:42,459 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:42,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-09-21 12:25:42,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c143bb07c/cb2ef546c82747369689af688b92a263/FLAGc5090f4b8 [2020-09-21 12:25:42,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c143bb07c/cb2ef546c82747369689af688b92a263 [2020-09-21 12:25:42,781 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:42,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:42,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:42,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:42,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:42,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42, skipping insertion in model container [2020-09-21 12:25:42,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:42,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:43,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:43,085 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:43,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:43,130 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:43,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43 WrapperNode [2020-09-21 12:25:43,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:43,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:43,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:43,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:43,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (1/1) ... [2020-09-21 12:25:43,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:43,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:43,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:43,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:43,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (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 [2020-09-21 12:25:43,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:43,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:43,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:43,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:43,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:43,689 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:43,690 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:25:43,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:43 BoogieIcfgContainer [2020-09-21 12:25:43,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:43,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:43,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:43,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:43,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:42" (1/3) ... [2020-09-21 12:25:43,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511dead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:43, skipping insertion in model container [2020-09-21 12:25:43,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:43" (2/3) ... [2020-09-21 12:25:43,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1511dead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:43, skipping insertion in model container [2020-09-21 12:25:43,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:43" (3/3) ... [2020-09-21 12:25:43,709 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-09-21 12:25:43,723 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:43,738 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:43,759 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:43,791 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:43,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:43,791 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:43,792 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:43,792 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:43,792 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:43,792 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:43,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:43,816 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-21 12:25:43,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:25:43,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:43,825 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:43,826 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:43,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:43,832 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-09-21 12:25:43,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:43,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245092562] [2020-09-21 12:25:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:25:44,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-21 12:25:44,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:44,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:44,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:25:44,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:44,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:44,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245092562] [2020-09-21 12:25:44,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114516118] [2020-09-21 12:25:44,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,414 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-21 12:25:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,481 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-09-21 12:25:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,484 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 12:25:44,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,500 INFO L225 Difference]: With dead ends: 93 [2020-09-21 12:25:44,500 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 12:25:44,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 12:25:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-09-21 12:25:44,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-21 12:25:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-09-21 12:25:44,562 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-09-21 12:25:44,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,563 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-09-21 12:25:44,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-09-21 12:25:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:25:44,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:44,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:44,565 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-09-21 12:25:44,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552815335] [2020-09-21 12:25:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:25:44,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-21 12:25:44,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:44,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:44,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:44,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:44,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552815335] [2020-09-21 12:25:44,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139393234] [2020-09-21 12:25:44,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,815 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-09-21 12:25:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,845 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-09-21 12:25:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 12:25:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,848 INFO L225 Difference]: With dead ends: 127 [2020-09-21 12:25:44,849 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 12:25:44,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 12:25:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-21 12:25:44,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-21 12:25:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-09-21 12:25:44,871 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-09-21 12:25:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,872 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-09-21 12:25:44,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-09-21 12:25:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:44,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:44,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:44,874 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-09-21 12:25:44,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979131914] [2020-09-21 12:25:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:45,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:45,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-21 12:25:45,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:45,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:45,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:45,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:45,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979131914] [2020-09-21 12:25:45,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209286621] [2020-09-21 12:25:45,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,121 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-09-21 12:25:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,165 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-09-21 12:25:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 12:25:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,167 INFO L225 Difference]: With dead ends: 117 [2020-09-21 12:25:45,168 INFO L226 Difference]: Without dead ends: 81 [2020-09-21 12:25:45,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-21 12:25:45,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-09-21 12:25:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 12:25:45,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-09-21 12:25:45,193 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-09-21 12:25:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,194 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-09-21 12:25:45,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-09-21 12:25:45,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:45,196 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:45,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:45,197 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-09-21 12:25:45,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321947480] [2020-09-21 12:25:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:45,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-21 12:25:45,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:45,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:45,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:45,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:45,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:45,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321947480] [2020-09-21 12:25:45,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506569958] [2020-09-21 12:25:45,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,350 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-09-21 12:25:45,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,391 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-09-21 12:25:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 12:25:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,397 INFO L225 Difference]: With dead ends: 148 [2020-09-21 12:25:45,398 INFO L226 Difference]: Without dead ends: 146 [2020-09-21 12:25:45,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-21 12:25:45,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-09-21 12:25:45,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-21 12:25:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-09-21 12:25:45,428 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-09-21 12:25:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,429 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-09-21 12:25:45,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-09-21 12:25:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:45,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:45,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:45,438 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,438 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-09-21 12:25:45,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890989146] [2020-09-21 12:25:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:45,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-21 12:25:45,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:45,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:45,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:45,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:45,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890989146] [2020-09-21 12:25:45,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612828260] [2020-09-21 12:25:45,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,539 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-09-21 12:25:45,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,564 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-09-21 12:25:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 12:25:45,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,567 INFO L225 Difference]: With dead ends: 244 [2020-09-21 12:25:45,567 INFO L226 Difference]: Without dead ends: 148 [2020-09-21 12:25:45,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-21 12:25:45,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-09-21 12:25:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-21 12:25:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-09-21 12:25:45,580 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-09-21 12:25:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,581 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-09-21 12:25:45,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-09-21 12:25:45,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:25:45,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:45,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:25:45,583 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,584 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-09-21 12:25:45,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629051028] [2020-09-21 12:25:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:25:45,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:45,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-09-21 12:25:45,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:45,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:45,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:45,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:45,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629051028] [2020-09-21 12:25:45,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290909779] [2020-09-21 12:25:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,713 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-09-21 12:25:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,731 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-09-21 12:25:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,732 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:25:45,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,733 INFO L225 Difference]: With dead ends: 219 [2020-09-21 12:25:45,733 INFO L226 Difference]: Without dead ends: 150 [2020-09-21 12:25:45,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-21 12:25:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-09-21 12:25:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-21 12:25:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-09-21 12:25:45,744 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-09-21 12:25:45,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,745 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-09-21 12:25:45,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-09-21 12:25:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:25:45,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:45,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:25:45,747 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-09-21 12:25:45,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393251117] [2020-09-21 12:25:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:25:45,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 12:25:45,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:45,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:45,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:45,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:45,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393251117] [2020-09-21 12:25:45,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064570405] [2020-09-21 12:25:45,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,831 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-09-21 12:25:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,849 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-09-21 12:25:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,850 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:25:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,852 INFO L225 Difference]: With dead ends: 276 [2020-09-21 12:25:45,853 INFO L226 Difference]: Without dead ends: 274 [2020-09-21 12:25:45,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-21 12:25:45,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-09-21 12:25:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-09-21 12:25:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-09-21 12:25:45,867 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-09-21 12:25:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,867 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-09-21 12:25:45,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-09-21 12:25:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:25:45,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:45,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:25:45,870 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-09-21 12:25:45,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760904957] [2020-09-21 12:25:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:25:45,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-21 12:25:45,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:45,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:45,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760904957] [2020-09-21 12:25:45,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534403539] [2020-09-21 12:25:45,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,998 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-09-21 12:25:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,051 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-09-21 12:25:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:25:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,055 INFO L225 Difference]: With dead ends: 472 [2020-09-21 12:25:46,056 INFO L226 Difference]: Without dead ends: 282 [2020-09-21 12:25:46,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-21 12:25:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-09-21 12:25:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-09-21 12:25:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-09-21 12:25:46,092 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-09-21 12:25:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,092 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-09-21 12:25:46,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-09-21 12:25:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:46,106 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:46,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:25:46,107 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-09-21 12:25:46,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705593941] [2020-09-21 12:25:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:25:46,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:46,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-21 12:25:46,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:46,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:46,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:46,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:46,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705593941] [2020-09-21 12:25:46,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112390119] [2020-09-21 12:25:46,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,312 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-09-21 12:25:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,333 INFO L93 Difference]: Finished difference Result 520 states and 908 transitions. [2020-09-21 12:25:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 12:25:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,338 INFO L225 Difference]: With dead ends: 520 [2020-09-21 12:25:46,338 INFO L226 Difference]: Without dead ends: 518 [2020-09-21 12:25:46,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-09-21 12:25:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 388. [2020-09-21 12:25:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-09-21 12:25:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 658 transitions. [2020-09-21 12:25:46,352 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 658 transitions. Word has length 24 [2020-09-21 12:25:46,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,353 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 658 transitions. [2020-09-21 12:25:46,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 658 transitions. [2020-09-21 12:25:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:46,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:25:46,355 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,355 INFO L82 PathProgramCache]: Analyzing trace with hash 376032409, now seen corresponding path program 1 times [2020-09-21 12:25:46,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378576432] [2020-09-21 12:25:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:25:46,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:46,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-09-21 12:25:46,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:46,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:46,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:46,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:46,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378576432] [2020-09-21 12:25:46,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440739243] [2020-09-21 12:25:46,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,479 INFO L87 Difference]: Start difference. First operand 388 states and 658 transitions. Second operand 3 states. [2020-09-21 12:25:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,504 INFO L93 Difference]: Finished difference Result 920 states and 1572 transitions. [2020-09-21 12:25:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 12:25:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,508 INFO L225 Difference]: With dead ends: 920 [2020-09-21 12:25:46,508 INFO L226 Difference]: Without dead ends: 542 [2020-09-21 12:25:46,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2020-09-21 12:25:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2020-09-21 12:25:46,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-09-21 12:25:46,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 910 transitions. [2020-09-21 12:25:46,528 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 910 transitions. Word has length 24 [2020-09-21 12:25:46,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,528 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 910 transitions. [2020-09-21 12:25:46,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,528 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 910 transitions. [2020-09-21 12:25:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:25:46,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:46,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:25:46,530 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash 52180548, now seen corresponding path program 1 times [2020-09-21 12:25:46,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313417456] [2020-09-21 12:25:46,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:25:46,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:46,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-09-21 12:25:46,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:46,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:46,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:46,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:25:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:46,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313417456] [2020-09-21 12:25:46,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124863508] [2020-09-21 12:25:46,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,764 INFO L87 Difference]: Start difference. First operand 540 states and 910 transitions. Second operand 3 states. [2020-09-21 12:25:46,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,793 INFO L93 Difference]: Finished difference Result 816 states and 1372 transitions. [2020-09-21 12:25:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 12:25:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,798 INFO L225 Difference]: With dead ends: 816 [2020-09-21 12:25:46,798 INFO L226 Difference]: Without dead ends: 554 [2020-09-21 12:25:46,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-09-21 12:25:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-09-21 12:25:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-21 12:25:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 918 transitions. [2020-09-21 12:25:46,817 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 918 transitions. Word has length 25 [2020-09-21 12:25:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,818 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 918 transitions. [2020-09-21 12:25:46,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 918 transitions. [2020-09-21 12:25:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:25:46,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:46,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:25:46,821 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1227683130, now seen corresponding path program 1 times [2020-09-21 12:25:46,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339796084] [2020-09-21 12:25:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:25:46,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:46,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 12:25:46,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:46,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:46,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:46,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:46,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339796084] [2020-09-21 12:25:46,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534470958] [2020-09-21 12:25:46,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,957 INFO L87 Difference]: Start difference. First operand 552 states and 918 transitions. Second operand 3 states. [2020-09-21 12:25:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,980 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-09-21 12:25:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 12:25:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,984 INFO L225 Difference]: With dead ends: 816 [2020-09-21 12:25:46,984 INFO L226 Difference]: Without dead ends: 554 [2020-09-21 12:25:46,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-09-21 12:25:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-09-21 12:25:46,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-09-21 12:25:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-09-21 12:25:47,001 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-09-21 12:25:47,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,001 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-09-21 12:25:47,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-09-21 12:25:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:25:47,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:47,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:25:47,003 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-09-21 12:25:47,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671533142] [2020-09-21 12:25:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:25:47,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-21 12:25:47,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:47,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:47,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:47,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:47,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:47,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671533142] [2020-09-21 12:25:47,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022152408] [2020-09-21 12:25:47,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,109 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-09-21 12:25:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,143 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-09-21 12:25:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 12:25:47,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,150 INFO L225 Difference]: With dead ends: 1004 [2020-09-21 12:25:47,151 INFO L226 Difference]: Without dead ends: 1002 [2020-09-21 12:25:47,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-09-21 12:25:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-09-21 12:25:47,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-09-21 12:25:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-09-21 12:25:47,185 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-09-21 12:25:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,185 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-09-21 12:25:47,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-09-21 12:25:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:25:47,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:47,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:25:47,188 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-09-21 12:25:47,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639592086] [2020-09-21 12:25:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:47,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:47,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:47,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:47,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639592086] [2020-09-21 12:25:47,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415488106] [2020-09-21 12:25:47,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,269 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-09-21 12:25:47,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,303 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-09-21 12:25:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 12:25:47,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,310 INFO L225 Difference]: With dead ends: 1820 [2020-09-21 12:25:47,311 INFO L226 Difference]: Without dead ends: 1066 [2020-09-21 12:25:47,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-09-21 12:25:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-09-21 12:25:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-09-21 12:25:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-09-21 12:25:47,357 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-09-21 12:25:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,357 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-09-21 12:25:47,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-09-21 12:25:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:47,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:47,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:25:47,360 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-09-21 12:25:47,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191595293] [2020-09-21 12:25:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:47,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:47,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-21 12:25:47,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:47,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:47,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:47,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:47,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191595293] [2020-09-21 12:25:47,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81373138] [2020-09-21 12:25:47,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,489 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-09-21 12:25:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,527 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-09-21 12:25:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,534 INFO L225 Difference]: With dead ends: 1596 [2020-09-21 12:25:47,535 INFO L226 Difference]: Without dead ends: 1082 [2020-09-21 12:25:47,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-09-21 12:25:47,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-09-21 12:25:47,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-09-21 12:25:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-09-21 12:25:47,577 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-09-21 12:25:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,579 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-09-21 12:25:47,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-09-21 12:25:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:47,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:47,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:25:47,581 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-09-21 12:25:47,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781891252] [2020-09-21 12:25:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:47,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-21 12:25:47,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:47,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:47,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:47,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:47,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781891252] [2020-09-21 12:25:47,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781005139] [2020-09-21 12:25:47,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,675 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-09-21 12:25:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,715 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-09-21 12:25:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,725 INFO L225 Difference]: With dead ends: 1932 [2020-09-21 12:25:47,725 INFO L226 Difference]: Without dead ends: 1930 [2020-09-21 12:25:47,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-09-21 12:25:47,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-09-21 12:25:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-09-21 12:25:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-09-21 12:25:47,810 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-09-21 12:25:47,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,810 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-09-21 12:25:47,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-09-21 12:25:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:47,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:47,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:25:47,814 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-09-21 12:25:47,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057556413] [2020-09-21 12:25:47,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:47,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-21 12:25:47,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:47,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:47,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:47,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:47,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057556413] [2020-09-21 12:25:47,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544873875] [2020-09-21 12:25:47,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,892 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-09-21 12:25:47,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,942 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-09-21 12:25:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,954 INFO L225 Difference]: With dead ends: 3596 [2020-09-21 12:25:47,955 INFO L226 Difference]: Without dead ends: 2090 [2020-09-21 12:25:47,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-09-21 12:25:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-09-21 12:25:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-09-21 12:25:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-09-21 12:25:48,026 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-09-21 12:25:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:48,027 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-09-21 12:25:48,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-09-21 12:25:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:25:48,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:48,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:48,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:25:48,030 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:48,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-09-21 12:25:48,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:48,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782158221] [2020-09-21 12:25:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:25:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-09-21 12:25:48,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:25:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:48,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:48,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:48,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:48,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:48,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:48,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:48,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782158221] [2020-09-21 12:25:48,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:48,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:48,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932954541] [2020-09-21 12:25:48,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:48,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:48,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,149 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-09-21 12:25:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:48,209 INFO L93 Difference]: Finished difference Result 3692 states and 5672 transitions. [2020-09-21 12:25:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:48,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 12:25:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:48,228 INFO L225 Difference]: With dead ends: 3692 [2020-09-21 12:25:48,228 INFO L226 Difference]: Without dead ends: 3690 [2020-09-21 12:25:48,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2020-09-21 12:25:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3048. [2020-09-21 12:25:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3048 states. [2020-09-21 12:25:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3048 states to 3048 states and 4454 transitions. [2020-09-21 12:25:48,316 INFO L78 Accepts]: Start accepts. Automaton has 3048 states and 4454 transitions. Word has length 27 [2020-09-21 12:25:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:48,316 INFO L479 AbstractCegarLoop]: Abstraction has 3048 states and 4454 transitions. [2020-09-21 12:25:48,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3048 states and 4454 transitions. [2020-09-21 12:25:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:25:48,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:48,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:48,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:25:48,322 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1588017237, now seen corresponding path program 1 times [2020-09-21 12:25:48,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:48,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794224617] [2020-09-21 12:25:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:25:48,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:48,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-21 12:25:48,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:25:48,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:48,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:48,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:48,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:48,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:48,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:48,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794224617] [2020-09-21 12:25:48,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:48,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:48,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943811434] [2020-09-21 12:25:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:48,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,437 INFO L87 Difference]: Start difference. First operand 3048 states and 4454 transitions. Second operand 3 states. [2020-09-21 12:25:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:48,517 INFO L93 Difference]: Finished difference Result 7084 states and 10408 transitions. [2020-09-21 12:25:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:48,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 12:25:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:48,539 INFO L225 Difference]: With dead ends: 7084 [2020-09-21 12:25:48,539 INFO L226 Difference]: Without dead ends: 4074 [2020-09-21 12:25:48,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2020-09-21 12:25:48,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 4072. [2020-09-21 12:25:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4072 states. [2020-09-21 12:25:48,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 5894 transitions. [2020-09-21 12:25:48,723 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 5894 transitions. Word has length 27 [2020-09-21 12:25:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:48,723 INFO L479 AbstractCegarLoop]: Abstraction has 4072 states and 5894 transitions. [2020-09-21 12:25:48,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 5894 transitions. [2020-09-21 12:25:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:25:48,730 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:48,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:48,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 12:25:48,731 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:48,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:48,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1030994425, now seen corresponding path program 1 times [2020-09-21 12:25:48,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:48,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042301657] [2020-09-21 12:25:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:25:48,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-21 12:25:48,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:48,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:25:48,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:48,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:48,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:48,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:48,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:48,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:48,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:48,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042301657] [2020-09-21 12:25:48,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:48,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:48,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695691875] [2020-09-21 12:25:48,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:48,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:48,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:48,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,936 INFO L87 Difference]: Start difference. First operand 4072 states and 5894 transitions. Second operand 3 states. [2020-09-21 12:25:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:49,053 INFO L93 Difference]: Finished difference Result 12012 states and 17288 transitions. [2020-09-21 12:25:49,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:49,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 12:25:49,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:49,092 INFO L225 Difference]: With dead ends: 12012 [2020-09-21 12:25:49,092 INFO L226 Difference]: Without dead ends: 7978 [2020-09-21 12:25:49,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:49,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2020-09-21 12:25:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 7976. [2020-09-21 12:25:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7976 states. [2020-09-21 12:25:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 11206 transitions. [2020-09-21 12:25:49,377 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 11206 transitions. Word has length 28 [2020-09-21 12:25:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:49,378 INFO L479 AbstractCegarLoop]: Abstraction has 7976 states and 11206 transitions. [2020-09-21 12:25:49,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 11206 transitions. [2020-09-21 12:25:49,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:25:49,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:49,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:49,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 12:25:49,390 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:49,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash -19877175, now seen corresponding path program 1 times [2020-09-21 12:25:49,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:49,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991046986] [2020-09-21 12:25:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:49,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:49,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:25:49,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:49,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-21 12:25:49,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:49,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:49,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:25:49,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:49,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:49,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:49,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:49,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:49,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:49,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:49,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:49,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:49,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:49,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991046986] [2020-09-21 12:25:49,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:49,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:49,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007508734] [2020-09-21 12:25:49,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:49,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:49,605 INFO L87 Difference]: Start difference. First operand 7976 states and 11206 transitions. Second operand 3 states. [2020-09-21 12:25:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:49,721 INFO L93 Difference]: Finished difference Result 9004 states and 13000 transitions. [2020-09-21 12:25:49,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:49,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 12:25:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:49,742 INFO L225 Difference]: With dead ends: 9004 [2020-09-21 12:25:49,743 INFO L226 Difference]: Without dead ends: 9002 [2020-09-21 12:25:49,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:49,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9002 states. [2020-09-21 12:25:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9002 to 7976. [2020-09-21 12:25:49,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7976 states. [2020-09-21 12:25:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 11078 transitions. [2020-09-21 12:25:49,955 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 11078 transitions. Word has length 28 [2020-09-21 12:25:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:49,955 INFO L479 AbstractCegarLoop]: Abstraction has 7976 states and 11078 transitions. [2020-09-21 12:25:49,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:49,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 11078 transitions. [2020-09-21 12:25:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:49,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:49,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:49,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 12:25:49,967 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1895840660, now seen corresponding path program 1 times [2020-09-21 12:25:49,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:49,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383394391] [2020-09-21 12:25:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:49,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:50,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:50,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:50,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-09-21 12:25:50,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:25:50,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:50,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:50,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:50,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:50,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:50,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:50,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:50,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:50,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:50,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:50,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383394391] [2020-09-21 12:25:50,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:50,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:50,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839248438] [2020-09-21 12:25:50,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:50,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:50,268 INFO L87 Difference]: Start difference. First operand 7976 states and 11078 transitions. Second operand 3 states. [2020-09-21 12:25:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:50,371 INFO L93 Difference]: Finished difference Result 11980 states and 16584 transitions. [2020-09-21 12:25:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:50,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:50,389 INFO L225 Difference]: With dead ends: 11980 [2020-09-21 12:25:50,390 INFO L226 Difference]: Without dead ends: 8074 [2020-09-21 12:25:50,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:50,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-09-21 12:25:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-09-21 12:25:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-09-21 12:25:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 11014 transitions. [2020-09-21 12:25:50,598 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 11014 transitions. Word has length 29 [2020-09-21 12:25:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:50,599 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 11014 transitions. [2020-09-21 12:25:50,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 11014 transitions. [2020-09-21 12:25:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:50,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:50,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:50,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 12:25:50,615 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:50,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:50,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1378058282, now seen corresponding path program 1 times [2020-09-21 12:25:50,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:50,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143173776] [2020-09-21 12:25:50,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:50,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:50,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:50,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:50,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-21 12:25:50,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:50,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:50,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:50,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:50,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:50,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:50,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:50,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:50,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:50,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:50,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:50,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:50,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:50,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:50,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:50,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:50,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143173776] [2020-09-21 12:25:50,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:50,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:50,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663840392] [2020-09-21 12:25:50,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:50,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:50,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:50,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:50,775 INFO L87 Difference]: Start difference. First operand 8072 states and 11014 transitions. Second operand 3 states. [2020-09-21 12:25:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:51,046 INFO L93 Difference]: Finished difference Result 13708 states and 18952 transitions. [2020-09-21 12:25:51,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:51,047 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:51,076 INFO L225 Difference]: With dead ends: 13708 [2020-09-21 12:25:51,076 INFO L226 Difference]: Without dead ends: 13706 [2020-09-21 12:25:51,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-09-21 12:25:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-09-21 12:25:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-09-21 12:25:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 16134 transitions. [2020-09-21 12:25:51,332 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 16134 transitions. Word has length 29 [2020-09-21 12:25:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:51,332 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 16134 transitions. [2020-09-21 12:25:51,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 16134 transitions. [2020-09-21 12:25:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:51,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:51,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:51,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 12:25:51,351 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:51,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:51,351 INFO L82 PathProgramCache]: Analyzing trace with hash 366941032, now seen corresponding path program 1 times [2020-09-21 12:25:51,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:51,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332045509] [2020-09-21 12:25:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:51,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:51,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:51,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:51,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:51,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:51,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-21 12:25:51,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:51,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:51,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:51,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:51,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:51,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:51,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:51,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:51,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:51,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:51,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:51,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332045509] [2020-09-21 12:25:51,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:51,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:51,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828093351] [2020-09-21 12:25:51,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:51,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:51,462 INFO L87 Difference]: Start difference. First operand 12168 states and 16134 transitions. Second operand 3 states. [2020-09-21 12:25:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:51,660 INFO L93 Difference]: Finished difference Result 27788 states and 36872 transitions. [2020-09-21 12:25:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:51,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:51,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:51,692 INFO L225 Difference]: With dead ends: 27788 [2020-09-21 12:25:51,693 INFO L226 Difference]: Without dead ends: 15754 [2020-09-21 12:25:51,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-09-21 12:25:52,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-09-21 12:25:52,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-09-21 12:25:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 20486 transitions. [2020-09-21 12:25:52,166 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 20486 transitions. Word has length 29 [2020-09-21 12:25:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:52,167 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 20486 transitions. [2020-09-21 12:25:52,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 20486 transitions. [2020-09-21 12:25:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:52,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:52,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:52,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 12:25:52,186 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:52,187 INFO L82 PathProgramCache]: Analyzing trace with hash -229650434, now seen corresponding path program 1 times [2020-09-21 12:25:52,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:52,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710525019] [2020-09-21 12:25:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:52,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:25:52,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-21 12:25:52,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:52,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:52,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:52,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:52,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:52,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:52,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:52,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:52,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710525019] [2020-09-21 12:25:52,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:52,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:52,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363838721] [2020-09-21 12:25:52,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:52,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:52,363 INFO L87 Difference]: Start difference. First operand 15752 states and 20486 transitions. Second operand 3 states. [2020-09-21 12:25:52,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:52,524 INFO L93 Difference]: Finished difference Result 23436 states and 30216 transitions. [2020-09-21 12:25:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:52,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 12:25:52,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:53,060 INFO L225 Difference]: With dead ends: 23436 [2020-09-21 12:25:53,061 INFO L226 Difference]: Without dead ends: 15754 [2020-09-21 12:25:53,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-09-21 12:25:53,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-09-21 12:25:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-09-21 12:25:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-09-21 12:25:53,363 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 30 [2020-09-21 12:25:53,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:53,364 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-09-21 12:25:53,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-09-21 12:25:53,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:53,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:53,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:53,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 12:25:53,382 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:53,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-09-21 12:25:53,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:53,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706103960] [2020-09-21 12:25:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:53,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:53,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:53,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:53,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:25:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:53,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-21 12:25:53,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:53,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:53,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:53,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:53,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:53,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:53,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:53,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:53,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:53,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:53,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:53,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706103960] [2020-09-21 12:25:53,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:53,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:53,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857676153] [2020-09-21 12:25:53,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:53,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:53,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:53,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:53,489 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-09-21 12:25:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:53,648 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-09-21 12:25:53,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:53,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 12:25:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:53,695 INFO L225 Difference]: With dead ends: 23820 [2020-09-21 12:25:53,696 INFO L226 Difference]: Without dead ends: 16138 [2020-09-21 12:25:53,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-09-21 12:25:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-09-21 12:25:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-09-21 12:25:54,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-09-21 12:25:54,314 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-09-21 12:25:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:54,314 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-09-21 12:25:54,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-09-21 12:25:54,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:54,340 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:54,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:54,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 12:25:54,341 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-09-21 12:25:54,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:54,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268216694] [2020-09-21 12:25:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:54,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:54,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:54,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:25:54,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:54,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-09-21 12:25:54,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:25:54,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:54,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:54,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:54,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:54,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:54,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:54,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:54,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:54,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:54,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:54,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:54,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:54,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268216694] [2020-09-21 12:25:54,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:54,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:54,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728283421] [2020-09-21 12:25:54,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:54,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:54,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:54,437 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-09-21 12:25:54,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:54,863 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-09-21 12:25:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:54,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 12:25:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:54,936 INFO L225 Difference]: With dead ends: 26636 [2020-09-21 12:25:54,936 INFO L226 Difference]: Without dead ends: 26634 [2020-09-21 12:25:54,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:54,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-09-21 12:25:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-09-21 12:25:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-09-21 12:25:55,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-09-21 12:25:55,465 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-09-21 12:25:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:55,465 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-09-21 12:25:55,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-09-21 12:25:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 12:25:55,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:55,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:55,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 12:25:55,497 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:55,497 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-09-21 12:25:55,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:55,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380187981] [2020-09-21 12:25:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:55,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:55,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:55,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 12:25:55,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:55,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:25:55,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:55,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:25:55,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:55,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:55,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:55,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:55,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:55,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:55,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:55,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:55,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:55,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:55,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:55,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:55,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380187981] [2020-09-21 12:25:55,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:55,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:55,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792652344] [2020-09-21 12:25:55,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:55,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:55,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:55,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:55,573 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-09-21 12:25:55,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:55,911 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-09-21 12:25:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:55,912 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-21 12:25:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:55,969 INFO L225 Difference]: With dead ends: 55308 [2020-09-21 12:25:55,970 INFO L226 Difference]: Without dead ends: 31242 [2020-09-21 12:25:56,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-09-21 12:25:56,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-09-21 12:25:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-09-21 12:25:56,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-09-21 12:25:56,839 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-09-21 12:25:56,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:56,839 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-09-21 12:25:56,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-09-21 12:25:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:25:56,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:56,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:56,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 12:25:56,863 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:56,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-09-21 12:25:56,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:56,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140943235] [2020-09-21 12:25:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:56,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:56,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 12:25:56,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:56,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-21 12:25:56,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:56,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:56,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:25:56,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 12:25:56,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:56,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:56,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:56,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:56,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:56,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:56,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:56,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:56,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:56,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:56,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:57,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140943235] [2020-09-21 12:25:57,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:57,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:57,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993125361] [2020-09-21 12:25:57,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:57,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:57,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:57,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:57,002 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-09-21 12:25:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:57,695 INFO L93 Difference]: Finished difference Result 50698 states and 59399 transitions. [2020-09-21 12:25:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:57,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-21 12:25:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:57,793 INFO L225 Difference]: With dead ends: 50698 [2020-09-21 12:25:57,793 INFO L226 Difference]: Without dead ends: 50696 [2020-09-21 12:25:57,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50696 states. [2020-09-21 12:25:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50696 to 48648. [2020-09-21 12:25:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48648 states. [2020-09-21 12:25:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48648 states to 48648 states and 56326 transitions. [2020-09-21 12:25:58,850 INFO L78 Accepts]: Start accepts. Automaton has 48648 states and 56326 transitions. Word has length 31 [2020-09-21 12:25:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:58,850 INFO L479 AbstractCegarLoop]: Abstraction has 48648 states and 56326 transitions. [2020-09-21 12:25:58,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 48648 states and 56326 transitions. [2020-09-21 12:25:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 12:25:58,888 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:58,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:25:58,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 12:25:58,888 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:58,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2044825213, now seen corresponding path program 1 times [2020-09-21 12:25:58,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:58,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79406105] [2020-09-21 12:25:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 12:25:58,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:58,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-21 12:25:58,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-21 12:25:58,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:58,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:58,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:58,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:58,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:58,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:58,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:58,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:58,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:58,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:58,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:58,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79406105] [2020-09-21 12:25:58,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:58,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:58,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542419331] [2020-09-21 12:25:58,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:58,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:58,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:58,997 INFO L87 Difference]: Start difference. First operand 48648 states and 56326 transitions. Second operand 3 states. [2020-09-21 12:25:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:59,736 INFO L93 Difference]: Finished difference Result 109064 states and 124934 transitions. [2020-09-21 12:25:59,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:59,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-09-21 12:25:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:59,738 INFO L225 Difference]: With dead ends: 109064 [2020-09-21 12:25:59,738 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:25:59,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:25:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:25:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:25:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:25:59,818 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-09-21 12:25:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:59,819 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:25:59,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:25:59,819 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:25:59,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 12:25:59,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:26:00,053 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:26:00,054 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:26:00,054 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:26:00,054 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:26:00,054 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:26:00,054 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:26:00,054 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-09-21 12:26:00,054 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-09-21 12:26:00,054 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-09-21 12:26:00,055 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-09-21 12:26:00,055 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-09-21 12:26:00,055 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-09-21 12:26:00,055 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,055 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,055 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,055 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,056 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-09-21 12:26:00,057 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,057 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,057 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-09-21 12:26:00,057 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-09-21 12:26:00,057 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-09-21 12:26:00,057 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-09-21 12:26:00,057 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,058 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,059 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-09-21 12:26:00,060 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-09-21 12:26:00,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:26:00 BoogieIcfgContainer [2020-09-21 12:26:00,073 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:26:00,077 INFO L168 Benchmark]: Toolchain (without parser) took 17292.54 ms. Allocated memory was 140.0 MB in the beginning and 962.1 MB in the end (delta: 822.1 MB). Free memory was 103.1 MB in the beginning and 748.9 MB in the end (delta: -645.8 MB). Peak memory consumption was 858.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:00,077 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:26:00,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.10 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:00,078 INFO L168 Benchmark]: Boogie Preprocessor took 129.80 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 181.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:00,079 INFO L168 Benchmark]: RCFGBuilder took 433.91 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 160.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:00,079 INFO L168 Benchmark]: TraceAbstraction took 16375.06 ms. Allocated memory was 203.4 MB in the beginning and 962.1 MB in the end (delta: 758.6 MB). Free memory was 160.7 MB in the beginning and 748.9 MB in the end (delta: -588.3 MB). Peak memory consumption was 852.9 MB. Max. memory is 7.1 GB. [2020-09-21 12:26:00,081 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.10 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.80 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 181.4 MB in the end (delta: -90.3 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.91 ms. Allocated memory is still 203.4 MB. Free memory was 181.4 MB in the beginning and 160.7 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16375.06 ms. Allocated memory was 203.4 MB in the beginning and 962.1 MB in the end (delta: 758.6 MB). Free memory was 160.7 MB in the beginning and 748.9 MB in the end (delta: -588.3 MB). Peak memory consumption was 852.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16.0s, OverallIterations: 30, TraceHistogramMax: 1, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2779 SDtfs, 1354 SDslu, 1904 SDs, 0 SdLazy, 160 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 150 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48648occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.4s AutomataMinimizationTime, 30 MinimizatonAttempts, 8222 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 782 NumberOfCodeBlocks, 782 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 752 ConstructedInterpolants, 0 QuantifiedInterpolants, 38454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 30 InterpolantComputations, 30 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...