/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:25:40,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:25:40,219 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:25:40,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:25:40,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:25:40,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:25:40,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:25:40,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:25:40,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:25:40,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:25:40,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:25:40,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:25:40,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:25:40,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:25:40,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:25:40,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:25:40,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:25:40,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:25:40,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:25:40,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:25:40,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:25:40,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:25:40,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:25:40,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:25:40,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:25:40,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:25:40,320 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:25:40,328 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:25:40,329 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:25:40,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:25:40,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:25:40,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:25:40,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:25:40,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:25:40,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:25:40,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:25:40,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:25:40,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:25:40,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:25:40,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:25:40,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:25:40,341 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 12:25:40,383 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:25:40,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:25:40,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:25:40,386 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:25:40,386 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:25:40,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:25:40,386 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:25:40,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:25:40,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:25:40,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:25:40,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:25:40,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:25:40,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:25:40,389 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:25:40,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:25:40,389 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:25:40,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:25:40,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:25:40,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:25:40,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:25:40,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:25:40,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:25:40,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:25:40,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:25:40,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:25:40,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:25:40,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:25:40,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:25:40,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:25:40,392 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 12:25:40,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:25:40,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:25:40,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:25:40,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:25:40,891 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:25:40,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-09-21 12:25:40,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c5aeb269/4db220182cd34e56b5bdf51bbeb075b9/FLAG511158c05 [2020-09-21 12:25:41,515 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:25:41,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-09-21 12:25:41,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c5aeb269/4db220182cd34e56b5bdf51bbeb075b9/FLAG511158c05 [2020-09-21 12:25:41,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c5aeb269/4db220182cd34e56b5bdf51bbeb075b9 [2020-09-21 12:25:41,890 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:25:41,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:25:41,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:41,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:25:41,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:25:41,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:41" (1/1) ... [2020-09-21 12:25:41,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528baabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:41, skipping insertion in model container [2020-09-21 12:25:41,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:25:41" (1/1) ... [2020-09-21 12:25:41,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:25:41,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:25:42,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:42,206 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:25:42,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:25:42,249 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:25:42,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42 WrapperNode [2020-09-21 12:25:42,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:25:42,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:25:42,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:25:42,251 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:25:42,342 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (1/1) ... [2020-09-21 12:25:42,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:25:42,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:25:42,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:25:42,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:25:42,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (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 12:25:42,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:25:42,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:25:42,440 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:25:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:25:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:25:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:25:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:25:42,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:25:42,774 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:25:42,775 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:25:42,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:42 BoogieIcfgContainer [2020-09-21 12:25:42,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:25:42,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:25:42,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:25:42,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:25:42,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:25:41" (1/3) ... [2020-09-21 12:25:42,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e6df8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:42, skipping insertion in model container [2020-09-21 12:25:42,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:25:42" (2/3) ... [2020-09-21 12:25:42,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e6df8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:25:42, skipping insertion in model container [2020-09-21 12:25:42,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:25:42" (3/3) ... [2020-09-21 12:25:42,791 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-09-21 12:25:42,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:25:42,815 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:25:42,840 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:25:42,878 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:25:42,878 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:25:42,879 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:25:42,879 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:25:42,879 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:25:42,880 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:25:42,880 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:25:42,880 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:25:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-21 12:25:42,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:25:42,917 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:42,919 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] [2020-09-21 12:25:42,919 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-09-21 12:25:42,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:42,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [62400822] [2020-09-21 12:25:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:43,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:25:43,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:43,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-09-21 12:25:43,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:43,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:43,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-21 12:25:43,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:43,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:43,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:43,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:43,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:43,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:43,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:43,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:43,422 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 12:25:43,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [62400822] [2020-09-21 12:25:43,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:43,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:43,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800804243] [2020-09-21 12:25:43,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:43,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:43,455 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-09-21 12:25:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:43,522 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-09-21 12:25:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:43,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 12:25:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:43,540 INFO L225 Difference]: With dead ends: 87 [2020-09-21 12:25:43,541 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 12:25:43,545 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 12:25:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 12:25:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-09-21 12:25:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-21 12:25:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-09-21 12:25:43,597 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-09-21 12:25:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:43,598 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-09-21 12:25:43,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-09-21 12:25:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 12:25:43,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:43,600 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] [2020-09-21 12:25:43,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:25:43,600 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-09-21 12:25:43,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:43,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211163934] [2020-09-21 12:25:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:43,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 12:25:43,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:43,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-21 12:25:43,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:43,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:43,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:43,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:43,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:43,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:43,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:43,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:43,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:43,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:25:43,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:43,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:43,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:43,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:43,815 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 12:25:43,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211163934] [2020-09-21 12:25:43,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:43,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:43,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114811904] [2020-09-21 12:25:43,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:43,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:43,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:43,823 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-09-21 12:25:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:43,851 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-09-21 12:25:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:43,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-21 12:25:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:43,854 INFO L225 Difference]: With dead ends: 117 [2020-09-21 12:25:43,854 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 12:25:43,856 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 12:25:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 12:25:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-09-21 12:25:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-21 12:25:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-09-21 12:25:43,869 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-09-21 12:25:43,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:43,869 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-09-21 12:25:43,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-09-21 12:25:43,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:25:43,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:43,871 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 12:25:43,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:25:43,872 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:43,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-09-21 12:25:43,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:43,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886606519] [2020-09-21 12:25:43,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:43,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:43,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:25:44,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:44,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-09-21 12:25:44,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:44,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:44,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 12:25:44,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:44,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,091 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 12:25:44,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886606519] [2020-09-21 12:25:44,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942155134] [2020-09-21 12:25:44,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,094 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-09-21 12:25:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,137 INFO L93 Difference]: Finished difference Result 133 states and 239 transitions. [2020-09-21 12:25:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,138 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 12:25:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,140 INFO L225 Difference]: With dead ends: 133 [2020-09-21 12:25:44,140 INFO L226 Difference]: Without dead ends: 131 [2020-09-21 12:25:44,141 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 12:25:44,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-21 12:25:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-09-21 12:25:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 12:25:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 167 transitions. [2020-09-21 12:25:44,155 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 167 transitions. Word has length 21 [2020-09-21 12:25:44,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,155 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 167 transitions. [2020-09-21 12:25:44,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 167 transitions. [2020-09-21 12:25:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:25:44,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,157 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 12:25:44,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 12:25:44,158 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1040419795, now seen corresponding path program 1 times [2020-09-21 12:25:44,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730031966] [2020-09-21 12:25:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:25:44,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:44,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-21 12:25:44,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 12:25:44,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:44,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,310 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 12:25:44,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730031966] [2020-09-21 12:25:44,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187684936] [2020-09-21 12:25:44,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,312 INFO L87 Difference]: Start difference. First operand 93 states and 167 transitions. Second operand 3 states. [2020-09-21 12:25:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,334 INFO L93 Difference]: Finished difference Result 142 states and 251 transitions. [2020-09-21 12:25:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 12:25:44,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,337 INFO L225 Difference]: With dead ends: 142 [2020-09-21 12:25:44,337 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 12:25:44,338 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 12:25:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 12:25:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-09-21 12:25:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-21 12:25:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-09-21 12:25:44,349 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-09-21 12:25:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,349 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-09-21 12:25:44,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-09-21 12:25:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 12:25:44,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,351 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 12:25:44,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 12:25:44,351 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,352 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-09-21 12:25:44,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798713747] [2020-09-21 12:25:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-21 12:25:44,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 12:25:44,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:44,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:44,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:44,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,436 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 12:25:44,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798713747] [2020-09-21 12:25:44,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090166940] [2020-09-21 12:25:44,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,439 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-09-21 12:25:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,460 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-09-21 12:25:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 12:25:44,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,462 INFO L225 Difference]: With dead ends: 224 [2020-09-21 12:25:44,463 INFO L226 Difference]: Without dead ends: 136 [2020-09-21 12:25:44,464 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 12:25:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-21 12:25:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-09-21 12:25:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-21 12:25:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-09-21 12:25:44,483 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-09-21 12:25:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,483 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-09-21 12:25:44,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-09-21 12:25:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:44,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,488 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 12:25:44,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 12:25:44,488 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-09-21 12:25:44,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451581022] [2020-09-21 12:25:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:44,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:44,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-21 12:25:44,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 12:25:44,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:44,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:44,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,649 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 12:25:44,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451581022] [2020-09-21 12:25:44,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594298979] [2020-09-21 12:25:44,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,653 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-09-21 12:25:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,675 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-09-21 12:25:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 12:25:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,677 INFO L225 Difference]: With dead ends: 201 [2020-09-21 12:25:44,677 INFO L226 Difference]: Without dead ends: 138 [2020-09-21 12:25:44,678 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 12:25:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-21 12:25:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-09-21 12:25:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-21 12:25:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-09-21 12:25:44,702 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-09-21 12:25:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,703 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-09-21 12:25:44,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-09-21 12:25:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:44,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,704 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 12:25:44,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 12:25:44,708 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,708 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-09-21 12:25:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853802287] [2020-09-21 12:25:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:44,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-21 12:25:44,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:44,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:44,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:44,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:44,804 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 12:25:44,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853802287] [2020-09-21 12:25:44,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599884826] [2020-09-21 12:25:44,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,807 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-09-21 12:25:44,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:44,835 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-09-21 12:25:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:44,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 12:25:44,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:44,838 INFO L225 Difference]: With dead ends: 252 [2020-09-21 12:25:44,838 INFO L226 Difference]: Without dead ends: 250 [2020-09-21 12:25:44,840 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 12:25:44,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-21 12:25:44,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-09-21 12:25:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-21 12:25:44,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-09-21 12:25:44,866 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-09-21 12:25:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:44,866 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-09-21 12:25:44,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-09-21 12:25:44,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 12:25:44,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:44,870 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] [2020-09-21 12:25:44,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 12:25:44,870 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:44,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:44,871 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-09-21 12:25:44,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:44,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290844662] [2020-09-21 12:25:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 12:25:44,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-09-21 12:25:44,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:44,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:44,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:44,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:44,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:44,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:44,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:44,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:25:44,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:44,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:44,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:44,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:44,970 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 12:25:44,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290844662] [2020-09-21 12:25:44,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:44,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:44,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234117266] [2020-09-21 12:25:44,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:44,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:44,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:44,973 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-09-21 12:25:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,013 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-09-21 12:25:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-21 12:25:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,016 INFO L225 Difference]: With dead ends: 432 [2020-09-21 12:25:45,016 INFO L226 Difference]: Without dead ends: 258 [2020-09-21 12:25:45,019 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 12:25:45,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-21 12:25:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-09-21 12:25:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-21 12:25:45,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-09-21 12:25:45,053 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-09-21 12:25:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,054 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-09-21 12:25:45,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,056 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-09-21 12:25:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:25:45,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,062 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 12:25:45,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 12:25:45,062 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-09-21 12:25:45,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214746343] [2020-09-21 12:25:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:25:45,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:45,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-09-21 12:25:45,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-21 12:25:45,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:45,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:45,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 21 [2020-09-21 12:25:45,248 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 12:25:45,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214746343] [2020-09-21 12:25:45,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585411955] [2020-09-21 12:25:45,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,251 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-09-21 12:25:45,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,272 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-09-21 12:25:45,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:25:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,275 INFO L225 Difference]: With dead ends: 384 [2020-09-21 12:25:45,275 INFO L226 Difference]: Without dead ends: 262 [2020-09-21 12:25:45,276 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 12:25:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-21 12:25:45,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-09-21 12:25:45,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-21 12:25:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-09-21 12:25:45,287 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-09-21 12:25:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,288 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-09-21 12:25:45,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-09-21 12:25:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:25:45,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,289 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 12:25:45,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 12:25:45,290 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-09-21 12:25:45,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732839611] [2020-09-21 12:25:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:25:45,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:25:45,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:45,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:45,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:45,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,368 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 12:25:45,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732839611] [2020-09-21 12:25:45,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547688556] [2020-09-21 12:25:45,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,370 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-09-21 12:25:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,388 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-09-21 12:25:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:25:45,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,392 INFO L225 Difference]: With dead ends: 476 [2020-09-21 12:25:45,392 INFO L226 Difference]: Without dead ends: 474 [2020-09-21 12:25:45,392 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 12:25:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-09-21 12:25:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-09-21 12:25:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-09-21 12:25:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-09-21 12:25:45,404 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-09-21 12:25:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,405 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-09-21 12:25:45,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-09-21 12:25:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 12:25:45,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,406 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 12:25:45,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 12:25:45,407 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-09-21 12:25:45,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030105948] [2020-09-21 12:25:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-21 12:25:45,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-21 12:25:45,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:45,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:45,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:45,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,478 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 12:25:45,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030105948] [2020-09-21 12:25:45,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753253461] [2020-09-21 12:25:45,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,480 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-09-21 12:25:45,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,503 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-09-21 12:25:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-21 12:25:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,507 INFO L225 Difference]: With dead ends: 844 [2020-09-21 12:25:45,507 INFO L226 Difference]: Without dead ends: 498 [2020-09-21 12:25:45,508 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 12:25:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-09-21 12:25:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-09-21 12:25:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-09-21 12:25:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-09-21 12:25:45,525 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-09-21 12:25:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,525 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-09-21 12:25:45,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,526 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-09-21 12:25:45,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:45,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,527 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 12:25:45,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 12:25:45,527 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,528 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-09-21 12:25:45,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927368219] [2020-09-21 12:25:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:25:45,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:45,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-21 12:25:45,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:45,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,640 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 12:25:45,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927368219] [2020-09-21 12:25:45,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530871278] [2020-09-21 12:25:45,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,642 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-09-21 12:25:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,665 INFO L93 Difference]: Finished difference Result 900 states and 1488 transitions. [2020-09-21 12:25:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 12:25:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,670 INFO L225 Difference]: With dead ends: 900 [2020-09-21 12:25:45,670 INFO L226 Difference]: Without dead ends: 898 [2020-09-21 12:25:45,671 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 12:25:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2020-09-21 12:25:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 704. [2020-09-21 12:25:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2020-09-21 12:25:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 1118 transitions. [2020-09-21 12:25:45,692 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 1118 transitions. Word has length 24 [2020-09-21 12:25:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,692 INFO L479 AbstractCegarLoop]: Abstraction has 704 states and 1118 transitions. [2020-09-21 12:25:45,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 1118 transitions. [2020-09-21 12:25:45,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 12:25:45,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,694 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 12:25:45,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 12:25:45,695 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,695 INFO L82 PathProgramCache]: Analyzing trace with hash -580676479, now seen corresponding path program 1 times [2020-09-21 12:25:45,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499422548] [2020-09-21 12:25:45,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 12:25:45,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:45,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-09-21 12:25:45,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:45,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:45,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:45,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:45,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:45,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:45,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:45,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:45,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:45,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:45,803 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 12:25:45,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499422548] [2020-09-21 12:25:45,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:45,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:45,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419003417] [2020-09-21 12:25:45,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:45,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:45,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:45,806 INFO L87 Difference]: Start difference. First operand 704 states and 1118 transitions. Second operand 3 states. [2020-09-21 12:25:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:45,841 INFO L93 Difference]: Finished difference Result 1652 states and 2640 transitions. [2020-09-21 12:25:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:45,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-09-21 12:25:45,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:45,846 INFO L225 Difference]: With dead ends: 1652 [2020-09-21 12:25:45,847 INFO L226 Difference]: Without dead ends: 962 [2020-09-21 12:25:45,848 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 12:25:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2020-09-21 12:25:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 960. [2020-09-21 12:25:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960 states. [2020-09-21 12:25:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1510 transitions. [2020-09-21 12:25:45,874 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1510 transitions. Word has length 24 [2020-09-21 12:25:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:45,874 INFO L479 AbstractCegarLoop]: Abstraction has 960 states and 1510 transitions. [2020-09-21 12:25:45,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1510 transitions. [2020-09-21 12:25:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:25:45,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:45,876 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 12:25:45,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 12:25:45,877 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash 190230329, now seen corresponding path program 1 times [2020-09-21 12:25:45,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:45,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011740144] [2020-09-21 12:25:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:45,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:45,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:25:46,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:46,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-09-21 12:25:46,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:46,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,058 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 12:25:46,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011740144] [2020-09-21 12:25:46,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641022917] [2020-09-21 12:25:46,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,060 INFO L87 Difference]: Start difference. First operand 960 states and 1510 transitions. Second operand 3 states. [2020-09-21 12:25:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,092 INFO L93 Difference]: Finished difference Result 1716 states and 2744 transitions. [2020-09-21 12:25:46,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 12:25:46,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,102 INFO L225 Difference]: With dead ends: 1716 [2020-09-21 12:25:46,103 INFO L226 Difference]: Without dead ends: 1714 [2020-09-21 12:25:46,104 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 12:25:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2020-09-21 12:25:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1392. [2020-09-21 12:25:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1392 states. [2020-09-21 12:25:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 2134 transitions. [2020-09-21 12:25:46,145 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 2134 transitions. Word has length 25 [2020-09-21 12:25:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,146 INFO L479 AbstractCegarLoop]: Abstraction has 1392 states and 2134 transitions. [2020-09-21 12:25:46,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 2134 transitions. [2020-09-21 12:25:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 12:25:46,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,149 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 12:25:46,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 12:25:46,149 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash -396575685, now seen corresponding path program 1 times [2020-09-21 12:25:46,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915566519] [2020-09-21 12:25:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 12:25:46,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:46,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-21 12:25:46,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:46,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:46,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:46,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,321 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 12:25:46,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915566519] [2020-09-21 12:25:46,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259966708] [2020-09-21 12:25:46,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,323 INFO L87 Difference]: Start difference. First operand 1392 states and 2134 transitions. Second operand 3 states. [2020-09-21 12:25:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,372 INFO L93 Difference]: Finished difference Result 3252 states and 5016 transitions. [2020-09-21 12:25:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-21 12:25:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,385 INFO L225 Difference]: With dead ends: 3252 [2020-09-21 12:25:46,385 INFO L226 Difference]: Without dead ends: 1874 [2020-09-21 12:25:46,388 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 12:25:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-09-21 12:25:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-09-21 12:25:46,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-09-21 12:25:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2838 transitions. [2020-09-21 12:25:46,443 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2838 transitions. Word has length 25 [2020-09-21 12:25:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,443 INFO L479 AbstractCegarLoop]: Abstraction has 1872 states and 2838 transitions. [2020-09-21 12:25:46,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2838 transitions. [2020-09-21 12:25:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:46,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,446 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 12:25:46,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 12:25:46,447 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1602387988, now seen corresponding path program 1 times [2020-09-21 12:25:46,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445064808] [2020-09-21 12:25:46,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:46,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-21 12:25:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-21 12:25:46,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-21 12:25:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:46,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:46,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:46,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:46,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:46,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:46,715 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 12:25:46,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445064808] [2020-09-21 12:25:46,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:46,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:46,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398009204] [2020-09-21 12:25:46,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:46,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:46,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:46,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:46,717 INFO L87 Difference]: Start difference. First operand 1872 states and 2838 transitions. Second operand 3 states. [2020-09-21 12:25:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:46,776 INFO L93 Difference]: Finished difference Result 2796 states and 4216 transitions. [2020-09-21 12:25:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:46,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:46,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:46,786 INFO L225 Difference]: With dead ends: 2796 [2020-09-21 12:25:46,786 INFO L226 Difference]: Without dead ends: 1882 [2020-09-21 12:25:46,787 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 12:25:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2020-09-21 12:25:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1880. [2020-09-21 12:25:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1880 states. [2020-09-21 12:25:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2790 transitions. [2020-09-21 12:25:46,838 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2790 transitions. Word has length 26 [2020-09-21 12:25:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:46,840 INFO L479 AbstractCegarLoop]: Abstraction has 1880 states and 2790 transitions. [2020-09-21 12:25:46,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2790 transitions. [2020-09-21 12:25:46,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:46,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:46,843 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 12:25:46,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 12:25:46,844 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:46,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:46,844 INFO L82 PathProgramCache]: Analyzing trace with hash 581319634, now seen corresponding path program 1 times [2020-09-21 12:25:46,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:46,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895887358] [2020-09-21 12:25:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:46,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:46,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:46,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:46,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-21 12:25:46,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 12:25:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:47,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,016 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 12:25:47,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895887358] [2020-09-21 12:25:47,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733729502] [2020-09-21 12:25:47,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,019 INFO L87 Difference]: Start difference. First operand 1880 states and 2790 transitions. Second operand 3 states. [2020-09-21 12:25:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,060 INFO L93 Difference]: Finished difference Result 2812 states and 4152 transitions. [2020-09-21 12:25:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,061 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,070 INFO L225 Difference]: With dead ends: 2812 [2020-09-21 12:25:47,070 INFO L226 Difference]: Without dead ends: 1898 [2020-09-21 12:25:47,074 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 12:25:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-09-21 12:25:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-09-21 12:25:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-09-21 12:25:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-09-21 12:25:47,128 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 26 [2020-09-21 12:25:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,129 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-09-21 12:25:47,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-09-21 12:25:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:47,132 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,132 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 12:25:47,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 12:25:47,132 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,133 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-09-21 12:25:47,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950089132] [2020-09-21 12:25:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:47,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:47,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-09-21 12:25:47,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-21 12:25:47,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:47,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [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: 1 [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:47,247 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 12:25:47,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950089132] [2020-09-21 12:25:47,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948242011] [2020-09-21 12:25:47,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,257 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-09-21 12:25:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,320 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-09-21 12:25:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,333 INFO L225 Difference]: With dead ends: 2844 [2020-09-21 12:25:47,334 INFO L226 Difference]: Without dead ends: 1930 [2020-09-21 12:25:47,339 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 12:25:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-09-21 12:25:47,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-09-21 12:25:47,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-09-21 12:25:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-09-21 12:25:47,430 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-09-21 12:25:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,431 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-09-21 12:25:47,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-09-21 12:25:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:47,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,438 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 12:25:47,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 12:25:47,439 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-09-21 12:25:47,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915902977] [2020-09-21 12:25:47,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:47,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-21 12:25:47,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:25:47,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:47,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:47,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,525 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 12:25:47,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915902977] [2020-09-21 12:25:47,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476382593] [2020-09-21 12:25:47,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,529 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-09-21 12:25:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,599 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-09-21 12:25:47,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,616 INFO L225 Difference]: With dead ends: 3340 [2020-09-21 12:25:47,616 INFO L226 Difference]: Without dead ends: 3338 [2020-09-21 12:25:47,618 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 12:25:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-09-21 12:25:47,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-09-21 12:25:47,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-09-21 12:25:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-09-21 12:25:47,714 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-09-21 12:25:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:47,714 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-09-21 12:25:47,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-09-21 12:25:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 12:25:47,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:47,720 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 12:25:47,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 12:25:47,720 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:47,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-09-21 12:25:47,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:47,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273626037] [2020-09-21 12:25:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 12:25:47,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 12:25:47,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:25:47,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:47,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:47,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:47,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:47,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:47,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:47,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:47,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 12:25:47,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:47,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:47,820 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 12:25:47,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273626037] [2020-09-21 12:25:47,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:47,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:47,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054003623] [2020-09-21 12:25:47,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:47,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:47,822 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-09-21 12:25:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:47,879 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-09-21 12:25:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:47,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-21 12:25:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:47,896 INFO L225 Difference]: With dead ends: 6476 [2020-09-21 12:25:47,896 INFO L226 Difference]: Without dead ends: 3722 [2020-09-21 12:25:47,901 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 12:25:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-09-21 12:25:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-09-21 12:25:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-09-21 12:25:48,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-09-21 12:25:48,004 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-09-21 12:25:48,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:48,005 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-09-21 12:25:48,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:48,005 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-09-21 12:25:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:25:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:48,010 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 12:25:48,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 12:25:48,010 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-09-21 12:25:48,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:48,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856087019] [2020-09-21 12:25:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:25:48,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:48,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-21 12:25:48,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:25:48,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:48,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:48,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:48,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:48,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:48,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:48,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:48,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,107 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 12:25:48,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856087019] [2020-09-21 12:25:48,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:48,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:48,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111270051] [2020-09-21 12:25:48,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:48,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:48,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,109 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-09-21 12:25:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:48,198 INFO L93 Difference]: Finished difference Result 10892 states and 14664 transitions. [2020-09-21 12:25:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:48,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 12:25:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:48,230 INFO L225 Difference]: With dead ends: 10892 [2020-09-21 12:25:48,230 INFO L226 Difference]: Without dead ends: 7242 [2020-09-21 12:25:48,238 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 12:25:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7242 states. [2020-09-21 12:25:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7242 to 7240. [2020-09-21 12:25:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7240 states. [2020-09-21 12:25:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 9478 transitions. [2020-09-21 12:25:48,406 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 9478 transitions. Word has length 27 [2020-09-21 12:25:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 7240 states and 9478 transitions. [2020-09-21 12:25:48,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 9478 transitions. [2020-09-21 12:25:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 12:25:48,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:48,416 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 12:25:48,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 12:25:48,416 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -872871122, now seen corresponding path program 1 times [2020-09-21 12:25:48,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:48,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127662608] [2020-09-21 12:25:48,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 12:25:48,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:48,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-09-21 12:25:48,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 12:25:48,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:48,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:48,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:48,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:48,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:48,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:48,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:48,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:48,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:25:48,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127662608] [2020-09-21 12:25:48,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:48,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:48,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814471838] [2020-09-21 12:25:48,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:48,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:48,613 INFO L87 Difference]: Start difference. First operand 7240 states and 9478 transitions. Second operand 3 states. [2020-09-21 12:25:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:48,718 INFO L93 Difference]: Finished difference Result 8012 states and 10760 transitions. [2020-09-21 12:25:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:48,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-09-21 12:25:48,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:48,735 INFO L225 Difference]: With dead ends: 8012 [2020-09-21 12:25:48,735 INFO L226 Difference]: Without dead ends: 8010 [2020-09-21 12:25:48,739 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 12:25:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2020-09-21 12:25:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 7240. [2020-09-21 12:25:48,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7240 states. [2020-09-21 12:25:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7240 states to 7240 states and 9350 transitions. [2020-09-21 12:25:48,909 INFO L78 Accepts]: Start accepts. Automaton has 7240 states and 9350 transitions. Word has length 27 [2020-09-21 12:25:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:48,909 INFO L479 AbstractCegarLoop]: Abstraction has 7240 states and 9350 transitions. [2020-09-21 12:25:48,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7240 states and 9350 transitions. [2020-09-21 12:25:48,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:25:48,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:48,918 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 12:25:48,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 12:25:48,918 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1994864807, now seen corresponding path program 1 times [2020-09-21 12:25:48,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:48,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170389299] [2020-09-21 12:25:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:48,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:49,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:49,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:49,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:49,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:49,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:49,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:49,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:49,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:49,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:49,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:49,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:49,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:49,035 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 12:25:49,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170389299] [2020-09-21 12:25:49,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:49,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:49,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872217114] [2020-09-21 12:25:49,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:49,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:49,039 INFO L87 Difference]: Start difference. First operand 7240 states and 9350 transitions. Second operand 3 states. [2020-09-21 12:25:49,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:49,185 INFO L93 Difference]: Finished difference Result 12108 states and 15752 transitions. [2020-09-21 12:25:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:49,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 12:25:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:49,209 INFO L225 Difference]: With dead ends: 12108 [2020-09-21 12:25:49,209 INFO L226 Difference]: Without dead ends: 12106 [2020-09-21 12:25:49,214 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 12:25:49,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12106 states. [2020-09-21 12:25:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12106 to 11080. [2020-09-21 12:25:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11080 states. [2020-09-21 12:25:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11080 states to 11080 states and 13958 transitions. [2020-09-21 12:25:49,468 INFO L78 Accepts]: Start accepts. Automaton has 11080 states and 13958 transitions. Word has length 28 [2020-09-21 12:25:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:49,468 INFO L479 AbstractCegarLoop]: Abstraction has 11080 states and 13958 transitions. [2020-09-21 12:25:49,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 11080 states and 13958 transitions. [2020-09-21 12:25:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 12:25:49,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:49,487 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 12:25:49,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 12:25:49,487 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1408058793, now seen corresponding path program 1 times [2020-09-21 12:25:49,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:49,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826033733] [2020-09-21 12:25:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:49,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:49,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 12:25:49,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:49,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-09-21 12:25:49,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:49,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:49,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:49,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:49,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:49,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:49,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:49,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:49,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:49,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:49,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:49,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:49,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:49,595 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 12:25:49,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826033733] [2020-09-21 12:25:49,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:49,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:49,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960609504] [2020-09-21 12:25:49,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:49,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:49,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:49,597 INFO L87 Difference]: Start difference. First operand 11080 states and 13958 transitions. Second operand 3 states. [2020-09-21 12:25:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:49,770 INFO L93 Difference]: Finished difference Result 25164 states and 31624 transitions. [2020-09-21 12:25:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:49,771 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-09-21 12:25:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:49,797 INFO L225 Difference]: With dead ends: 25164 [2020-09-21 12:25:49,797 INFO L226 Difference]: Without dead ends: 14154 [2020-09-21 12:25:49,818 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 12:25:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14154 states. [2020-09-21 12:25:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14154 to 14152. [2020-09-21 12:25:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14152 states. [2020-09-21 12:25:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14152 states to 14152 states and 17286 transitions. [2020-09-21 12:25:50,197 INFO L78 Accepts]: Start accepts. Automaton has 14152 states and 17286 transitions. Word has length 28 [2020-09-21 12:25:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:50,198 INFO L479 AbstractCegarLoop]: Abstraction has 14152 states and 17286 transitions. [2020-09-21 12:25:50,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:50,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14152 states and 17286 transitions. [2020-09-21 12:25:50,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:50,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:50,220 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 12:25:50,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 12:25:50,221 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1711482981, now seen corresponding path program 1 times [2020-09-21 12:25:50,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:50,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594475710] [2020-09-21 12:25:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:50,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:50,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:50,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-21 12:25:50,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-21 12:25:50,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-21 12:25:50,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:50,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:50,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:50,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:50,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:50,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:50,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:50,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:50,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:50,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:50,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:50,430 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 12:25:50,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594475710] [2020-09-21 12:25:50,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:50,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:50,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831546242] [2020-09-21 12:25:50,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:50,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:50,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:50,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:50,432 INFO L87 Difference]: Start difference. First operand 14152 states and 17286 transitions. Second operand 3 states. [2020-09-21 12:25:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:50,593 INFO L93 Difference]: Finished difference Result 21132 states and 25608 transitions. [2020-09-21 12:25:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:50,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:50,619 INFO L225 Difference]: With dead ends: 21132 [2020-09-21 12:25:50,620 INFO L226 Difference]: Without dead ends: 14218 [2020-09-21 12:25:50,634 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 12:25:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-09-21 12:25:51,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-09-21 12:25:51,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-09-21 12:25:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-09-21 12:25:51,362 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 29 [2020-09-21 12:25:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:51,363 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-09-21 12:25:51,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:51,363 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-09-21 12:25:51,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:51,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:51,380 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 12:25:51,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 12:25:51,380 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:51,380 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-09-21 12:25:51,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:51,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613557845] [2020-09-21 12:25:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:51,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:51,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:51,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:51,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:51,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-21 12:25:51,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-21 12:25:51,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-21 12:25:51,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:51,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:51,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:51,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:51,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:51,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:51,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:51,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:51,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:51,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:51,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:51,481 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 12:25:51,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613557845] [2020-09-21 12:25:51,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:51,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:51,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61845047] [2020-09-21 12:25:51,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:51,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:51,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:51,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:51,483 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-09-21 12:25:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:51,626 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-09-21 12:25:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:51,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:51,651 INFO L225 Difference]: With dead ends: 21516 [2020-09-21 12:25:51,652 INFO L226 Difference]: Without dead ends: 14602 [2020-09-21 12:25:51,665 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 12:25:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-09-21 12:25:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-09-21 12:25:51,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-09-21 12:25:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-09-21 12:25:52,015 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-09-21 12:25:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:52,016 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-09-21 12:25:52,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-09-21 12:25:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:52,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:52,032 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 12:25:52,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 12:25:52,033 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:52,034 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-09-21 12:25:52,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:52,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658906108] [2020-09-21 12:25:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:52,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:52,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:52,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:52,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-21 12:25:52,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:25:52,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 12:25:52,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:52,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:52,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:52,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:52,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:52,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 12:25:52,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:52,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:52,118 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 12:25:52,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658906108] [2020-09-21 12:25:52,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:52,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:52,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336266673] [2020-09-21 12:25:52,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:52,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:52,120 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-09-21 12:25:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:52,356 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-09-21 12:25:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:52,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:52,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:52,387 INFO L225 Difference]: With dead ends: 23562 [2020-09-21 12:25:52,388 INFO L226 Difference]: Without dead ends: 23560 [2020-09-21 12:25:52,395 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 12:25:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-09-21 12:25:52,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-09-21 12:25:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-09-21 12:25:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-09-21 12:25:52,745 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-09-21 12:25:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:52,745 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-09-21 12:25:52,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-09-21 12:25:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-21 12:25:52,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:25:52,777 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 12:25:52,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 12:25:52,777 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:25:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:25:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-09-21 12:25:52,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:25:52,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341664698] [2020-09-21 12:25:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:25:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:52,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:52,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-21 12:25:52,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:52,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 12:25:52,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:25:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-21 12:25:52,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 12:25:52,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 12:25:52,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:25:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:25:52,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:25:52,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:25:52,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:25:52,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:25:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 12:25:52,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:25:52,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:25:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:25:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:25:52,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:25:52,845 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 12:25:52,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341664698] [2020-09-21 12:25:52,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:25:52,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:25:52,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952537509] [2020-09-21 12:25:52,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:25:52,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:25:52,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:25:52,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:25:52,847 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-09-21 12:25:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:25:53,260 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-09-21 12:25:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:25:53,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-09-21 12:25:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:25:53,261 INFO L225 Difference]: With dead ends: 50184 [2020-09-21 12:25:53,261 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:25:53,312 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 12:25:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:25:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:25:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:25:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:25:53,313 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-09-21 12:25:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:25:53,314 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:25:53,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:25:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:25:53,314 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:25:53,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 12:25:53,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:25:53,346 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:25:53,346 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:25:53,346 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:25:53,346 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:25:53,346 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:25:53,346 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:25:53,346 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-09-21 12:25:53,347 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-09-21 12:25:53,348 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-09-21 12:25:53,349 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-09-21 12:25:53,349 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-09-21 12:25:53,349 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-09-21 12:25:53,349 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,349 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,349 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-09-21 12:25:53,349 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-09-21 12:25:53,350 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-09-21 12:25:53,351 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-09-21 12:25:53,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:25:53 BoogieIcfgContainer [2020-09-21 12:25:53,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:25:53,368 INFO L168 Benchmark]: Toolchain (without parser) took 11475.84 ms. Allocated memory was 137.9 MB in the beginning and 647.0 MB in the end (delta: 509.1 MB). Free memory was 100.6 MB in the beginning and 412.6 MB in the end (delta: -312.0 MB). Peak memory consumption was 197.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:53,369 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 12:25:53,370 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.57 ms. Allocated memory is still 137.9 MB. Free memory was 100.0 MB in the beginning and 89.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:53,370 INFO L168 Benchmark]: Boogie Preprocessor took 120.32 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 89.3 MB in the beginning and 177.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:53,371 INFO L168 Benchmark]: RCFGBuilder took 410.61 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 157.8 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:53,371 INFO L168 Benchmark]: TraceAbstraction took 10582.38 ms. Allocated memory was 199.8 MB in the beginning and 647.0 MB in the end (delta: 447.2 MB). Free memory was 157.1 MB in the beginning and 412.6 MB in the end (delta: -255.5 MB). Peak memory consumption was 191.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:25:53,374 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 348.57 ms. Allocated memory is still 137.9 MB. Free memory was 100.0 MB in the beginning and 89.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.32 ms. Allocated memory was 137.9 MB in the beginning and 199.8 MB in the end (delta: 61.9 MB). Free memory was 89.3 MB in the beginning and 177.6 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 410.61 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 157.8 MB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10582.38 ms. Allocated memory was 199.8 MB in the beginning and 647.0 MB in the end (delta: 447.2 MB). Free memory was 157.1 MB in the beginning and 412.6 MB in the end (delta: -255.5 MB). Peak memory consumption was 191.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: 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, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.4s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2374 SDtfs, 1148 SDslu, 1619 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 692 NumberOfCodeBlocks, 692 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 664 ConstructedInterpolants, 0 QuantifiedInterpolants, 31668 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...