/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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:48,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:48,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:48,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:48,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:48,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:48,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:48,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:48,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:48,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:48,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:48,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:48,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:48,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:49,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:49,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:49,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:49,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:49,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:49,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:49,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:49,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:49,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:49,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:49,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:49,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:49,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:49,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:49,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:49,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:49,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:49,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:49,048 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:49,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:49,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:49,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:49,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:49,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:49,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:49,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:49,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:49,055 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 11:23:49,099 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:49,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:49,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:49,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:49,102 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:49,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:49,102 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:49,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:49,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:49,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:49,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:49,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:49,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:49,105 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:49,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:49,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:49,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:49,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:49,106 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:49,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:49,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:49,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:49,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:49,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:49,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:49,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:49,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:49,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:49,108 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:49,108 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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:49,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:49,583 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:49,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:49,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:49,591 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:49,592 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-1.c [2020-09-21 11:23:49,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/320d8a12f/a6548d18c87848f7aa7541df5e0311e2/FLAG4a134e2c1 [2020-09-21 11:23:50,226 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:50,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-1.c [2020-09-21 11:23:50,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/320d8a12f/a6548d18c87848f7aa7541df5e0311e2/FLAG4a134e2c1 [2020-09-21 11:23:50,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/320d8a12f/a6548d18c87848f7aa7541df5e0311e2 [2020-09-21 11:23:50,612 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:50,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:50,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:50,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:50,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:50,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:50" (1/1) ... [2020-09-21 11:23:50,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53565bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:50, skipping insertion in model container [2020-09-21 11:23:50,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:50" (1/1) ... [2020-09-21 11:23:50,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:50,668 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:50,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:50,895 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:50,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:51,018 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:51,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51 WrapperNode [2020-09-21 11:23:51,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:51,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:51,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:51,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:51,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:51,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:51,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:51,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:51,064 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (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 11:23:51,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:51,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-21 11:23:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:51,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:23:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:23:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:51,433 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:51,433 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:23:51,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:51 BoogieIcfgContainer [2020-09-21 11:23:51,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:51,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:51,442 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:51,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:51,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:50" (1/3) ... [2020-09-21 11:23:51,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:51, skipping insertion in model container [2020-09-21 11:23:51,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (2/3) ... [2020-09-21 11:23:51,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a3052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:51, skipping insertion in model container [2020-09-21 11:23:51,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:51" (3/3) ... [2020-09-21 11:23:51,450 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-1.c [2020-09-21 11:23:51,462 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:51,472 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:51,496 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:51,524 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:51,524 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:51,524 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:51,524 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:51,524 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:51,525 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:51,525 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:51,525 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-21 11:23:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:23:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:51,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:51,551 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:51,557 INFO L82 PathProgramCache]: Analyzing trace with hash 149844724, now seen corresponding path program 1 times [2020-09-21 11:23:51,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:51,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211869237] [2020-09-21 11:23:51,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:51,708 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:51,709 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:51,709 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:51,709 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:51,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:23:51,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:51,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:23:51,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:51,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:23:51,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:51,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:51,789 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:51,789 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:51,789 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:51,790 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:51,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:51,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:51,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:51,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:51,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:51,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:51,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-21 11:23:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:51,809 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:51,809 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:51,809 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:51,810 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:51,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:51,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:51,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:51,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:51,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:51,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:51,822 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 11:23:51,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211869237] [2020-09-21 11:23:51,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:51,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:51,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115766975] [2020-09-21 11:23:51,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:51,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:51,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:51,847 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-09-21 11:23:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:51,943 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-09-21 11:23:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:51,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-21 11:23:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:51,958 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:23:51,959 INFO L226 Difference]: Without dead ends: 17 [2020-09-21 11:23:51,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 11:23:51,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-09-21 11:23:52,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-09-21 11:23:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:23:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-21 11:23:52,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-09-21 11:23:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:52,009 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-21 11:23:52,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-21 11:23:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:23:52,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:52,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:52,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:52,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1249419983, now seen corresponding path program 1 times [2020-09-21 11:23:52,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:52,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637913910] [2020-09-21 11:23:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,182 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,183 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,183 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,183 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:23:52,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-09-21 11:23:52,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:23:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 11:23:52,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,251 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,252 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,252 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,252 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:52,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:52,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-21 11:23:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,263 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,264 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,264 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,264 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:52,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:52,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,273 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 11:23:52,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637913910] [2020-09-21 11:23:52,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:52,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:23:52,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676024999] [2020-09-21 11:23:52,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:23:52,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:52,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:23:52,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:23:52,277 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-21 11:23:52,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:52,336 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-21 11:23:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:23:52,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 11:23:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:52,338 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:23:52,338 INFO L226 Difference]: Without dead ends: 19 [2020-09-21 11:23:52,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-09-21 11:23:52,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-09-21 11:23:52,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 11:23:52,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-21 11:23:52,346 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-09-21 11:23:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:52,346 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-21 11:23:52,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:23:52,347 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-21 11:23:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:23:52,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:52,348 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:52,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:52,348 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:52,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1840889772, now seen corresponding path program 1 times [2020-09-21 11:23:52,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:52,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163734609] [2020-09-21 11:23:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,419 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:52,419 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,420 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,420 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:23:52,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:23:52,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:52,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:52,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:23:52,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:52,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,504 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,505 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,505 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,505 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:52,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:52,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:23:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,516 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,516 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,517 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,517 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:52,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:52,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:52,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163734609] [2020-09-21 11:23:52,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:52,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:23:52,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232653441] [2020-09-21 11:23:52,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:52,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:52,528 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 6 states. [2020-09-21 11:23:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:52,621 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-21 11:23:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:23:52,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-21 11:23:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:52,623 INFO L225 Difference]: With dead ends: 29 [2020-09-21 11:23:52,623 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:23:52,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:23:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:23:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:23:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-21 11:23:52,629 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-09-21 11:23:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:52,630 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-21 11:23:52,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-21 11:23:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:23:52,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:52,631 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:52,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:52,632 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:52,632 INFO L82 PathProgramCache]: Analyzing trace with hash -488804505, now seen corresponding path program 2 times [2020-09-21 11:23:52,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:52,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985601360] [2020-09-21 11:23:52,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,738 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:52,739 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,739 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,739 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:52,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-21 11:23:52,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:52,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:52,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 11:23:52,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:52,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,825 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,825 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,826 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,826 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:52,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:52,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:52,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,834 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,834 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,834 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,835 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:52,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:52,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:52,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985601360] [2020-09-21 11:23:52,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:52,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:23:52,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152751670] [2020-09-21 11:23:52,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:23:52,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:52,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:23:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:23:52,844 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 7 states. [2020-09-21 11:23:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:52,943 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-21 11:23:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:23:52,943 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-21 11:23:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:52,944 INFO L225 Difference]: With dead ends: 31 [2020-09-21 11:23:52,944 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:23:52,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:52,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:23:52,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-21 11:23:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:23:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-21 11:23:52,951 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-09-21 11:23:52,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:52,951 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-21 11:23:52,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:23:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-21 11:23:52,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:52,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:52,953 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:52,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:52,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:52,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:52,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1647043486, now seen corresponding path program 3 times [2020-09-21 11:23:52,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:52,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478783719] [2020-09-21 11:23:52,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,013 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:53,014 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,014 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,014 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:53,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:23:53,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:23:53,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:53,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:23:53,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,095 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,095 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,095 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,096 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 11:23:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,103 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,103 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,103 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,104 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478783719] [2020-09-21 11:23:53,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:53,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:23:53,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922174395] [2020-09-21 11:23:53,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:23:53,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:23:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:53,112 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 8 states. [2020-09-21 11:23:53,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,226 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-09-21 11:23:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:23:53,227 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-09-21 11:23:53,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,228 INFO L225 Difference]: With dead ends: 33 [2020-09-21 11:23:53,228 INFO L226 Difference]: Without dead ends: 25 [2020-09-21 11:23:53,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:23:53,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-21 11:23:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-21 11:23:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:23:53,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-09-21 11:23:53,235 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-09-21 11:23:53,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,235 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-09-21 11:23:53,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:23:53,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-09-21 11:23:53,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:53,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,237 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:53,237 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1976792733, now seen corresponding path program 4 times [2020-09-21 11:23:53,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384177522] [2020-09-21 11:23:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,305 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:53,305 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,306 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,306 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:23:53,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:23:53,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,396 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,396 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,397 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,397 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:23:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,405 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,405 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,405 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,406 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384177522] [2020-09-21 11:23:53,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:53,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:23:53,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522161095] [2020-09-21 11:23:53,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:23:53,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:23:53,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:23:53,415 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 9 states. [2020-09-21 11:23:53,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,552 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-21 11:23:53,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:23:53,552 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-21 11:23:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,553 INFO L225 Difference]: With dead ends: 35 [2020-09-21 11:23:53,554 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 11:23:53,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:23:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 11:23:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 11:23:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:23:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-21 11:23:53,560 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-09-21 11:23:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,561 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-21 11:23:53,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:23:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-21 11:23:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:23:53,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,562 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:53,563 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1264922136, now seen corresponding path program 5 times [2020-09-21 11:23:53,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261841389] [2020-09-21 11:23:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,633 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:53,633 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,633 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,634 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:23:53,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-21 11:23:53,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:53,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:53,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:23:53,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,742 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,742 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,743 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,743 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 11:23:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,751 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,751 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,751 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,751 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261841389] [2020-09-21 11:23:53,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:53,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:23:53,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238795685] [2020-09-21 11:23:53,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:23:53,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:23:53,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:53,761 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2020-09-21 11:23:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,918 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-09-21 11:23:53,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:23:53,919 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-21 11:23:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,920 INFO L225 Difference]: With dead ends: 37 [2020-09-21 11:23:53,920 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 11:23:53,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:23:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 11:23:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-09-21 11:23:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:23:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-09-21 11:23:53,926 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-09-21 11:23:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,926 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-09-21 11:23:53,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:23:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-09-21 11:23:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:23:53,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,927 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:23:53,928 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,928 INFO L82 PathProgramCache]: Analyzing trace with hash 57078483, now seen corresponding path program 6 times [2020-09-21 11:23:53,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349527187] [2020-09-21 11:23:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,000 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:54,000 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,000 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,000 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:23:54,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 11:23:54,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:23:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:23:54,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,103 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,103 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,103 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,103 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:23:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,109 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,109 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349527187] [2020-09-21 11:23:54,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:23:54,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86467802] [2020-09-21 11:23:54,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:23:54,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:23:54,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:23:54,118 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2020-09-21 11:23:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:54,269 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-21 11:23:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:23:54,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-09-21 11:23:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:54,270 INFO L225 Difference]: With dead ends: 39 [2020-09-21 11:23:54,270 INFO L226 Difference]: Without dead ends: 31 [2020-09-21 11:23:54,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:23:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-21 11:23:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-21 11:23:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:23:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-09-21 11:23:54,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-09-21 11:23:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:54,276 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-09-21 11:23:54,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:23:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-09-21 11:23:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:23:54,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:54,277 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:54,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:23:54,278 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1039502130, now seen corresponding path program 7 times [2020-09-21 11:23:54,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:54,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90437635] [2020-09-21 11:23:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,355 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:54,355 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,356 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,356 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:23:54,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 11:23:54,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:23:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-21 11:23:54,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,462 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,462 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,462 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,463 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:23:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,468 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,469 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,469 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,469 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90437635] [2020-09-21 11:23:54,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:23:54,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570017652] [2020-09-21 11:23:54,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:23:54,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:23:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:23:54,477 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 12 states. [2020-09-21 11:23:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:54,655 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-21 11:23:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:23:54,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-09-21 11:23:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:54,656 INFO L225 Difference]: With dead ends: 41 [2020-09-21 11:23:54,656 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:23:54,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:23:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:23:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 11:23:54,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:23:54,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-21 11:23:54,662 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-09-21 11:23:54,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:54,663 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-21 11:23:54,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:23:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-21 11:23:54,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:23:54,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:54,664 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:54,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:23:54,664 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1708483593, now seen corresponding path program 8 times [2020-09-21 11:23:54,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:54,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247775016] [2020-09-21 11:23:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,748 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:54,749 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,749 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,749 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:23:54,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-21 11:23:54,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:23:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:54,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-21 11:23:54,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,874 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,874 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,874 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,874 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 11:23:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,880 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,880 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,880 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,880 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:23:54,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247775016] [2020-09-21 11:23:54,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:23:54,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554177618] [2020-09-21 11:23:54,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:23:54,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:23:54,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:23:54,890 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 13 states. [2020-09-21 11:23:55,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:55,073 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-21 11:23:55,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:23:55,074 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-09-21 11:23:55,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:55,075 INFO L225 Difference]: With dead ends: 43 [2020-09-21 11:23:55,075 INFO L226 Difference]: Without dead ends: 35 [2020-09-21 11:23:55,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:23:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-21 11:23:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-21 11:23:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:23:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-09-21 11:23:55,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-09-21 11:23:55,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:55,081 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-09-21 11:23:55,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:23:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-09-21 11:23:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:23:55,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:55,082 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:55,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:23:55,082 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1117876356, now seen corresponding path program 9 times [2020-09-21 11:23:55,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:55,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283457677] [2020-09-21 11:23:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,169 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:23:55,170 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,170 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,170 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:23:55,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-09-21 11:23:55,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:23:55,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:55,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-09-21 11:23:55,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:55,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,329 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,329 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,329 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,329 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:55,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,335 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,335 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,335 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,336 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:55,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:55,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283457677] [2020-09-21 11:23:55,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:55,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:23:55,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122576427] [2020-09-21 11:23:55,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:23:55,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:23:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:23:55,365 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 14 states. [2020-09-21 11:23:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:55,592 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-09-21 11:23:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:23:55,593 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-09-21 11:23:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:55,594 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:23:55,594 INFO L226 Difference]: Without dead ends: 37 [2020-09-21 11:23:55,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:23:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-21 11:23:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-21 11:23:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:23:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-21 11:23:55,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-09-21 11:23:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:55,600 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-21 11:23:55,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:23:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-21 11:23:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:23:55,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:55,601 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:55,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:23:55,602 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash 480004671, now seen corresponding path program 10 times [2020-09-21 11:23:55,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:55,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907761268] [2020-09-21 11:23:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,770 FATAL L256 erpolLogProxyWrapper]: Difference in size: 11 [2020-09-21 11:23:55,770 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -1 [2020-09-21 11:23:55,770 FATAL L256 erpolLogProxyWrapper]: Difference in width: 1 [2020-09-21 11:23:55,770 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:23:55,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-21 11:23:55,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:23:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:55,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-21 11:23:55,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,939 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,939 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,940 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,940 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:55,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:23:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,965 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,965 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,966 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,966 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-21 11:23:55,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:55,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:55,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:23:55,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-09-21 11:23:56,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907761268] [2020-09-21 11:23:56,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:56,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:23:56,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236242577] [2020-09-21 11:23:56,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:23:56,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:56,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:23:56,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:56,007 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 10 states. [2020-09-21 11:23:56,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:56,209 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-09-21 11:23:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:23:56,209 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-21 11:23:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:56,210 INFO L225 Difference]: With dead ends: 37 [2020-09-21 11:23:56,210 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:23:56,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:23:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:23:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:23:56,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:23:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:23:56,212 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2020-09-21 11:23:56,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:56,212 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:23:56,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:23:56,213 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:23:56,213 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:23:56,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:23:56,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:23:56,311 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:23:56,312 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-09-21 11:23:56,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:23:56,312 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:23:56,312 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:23:56,313 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point L29-1(lines 29 31) no Hoare annotation was computed. [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 38) no Hoare annotation was computed. [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point L21(lines 21 32) no Hoare annotation was computed. [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 32) no Hoare annotation was computed. [2020-09-21 11:23:56,313 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 38) no Hoare annotation was computed. [2020-09-21 11:23:56,314 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 36) no Hoare annotation was computed. [2020-09-21 11:23:56,314 INFO L264 CegarLoopResult]: At program point L30(lines 15 38) the Hoare annotation is: false [2020-09-21 11:23:56,314 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 14 38) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-09-21 11:23:56,314 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 28) no Hoare annotation was computed. [2020-09-21 11:23:56,314 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 28) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) (and (= main_~pa~0.base |main_~#ad1~0.base|) (= (+ (* .cse0 8) |main_~#ad1~0.offset|) main_~pa~0.offset) (<= main_~i~0 .cse0))) [2020-09-21 11:23:56,315 INFO L264 CegarLoopResult]: At program point L26-4(lines 26 28) the Hoare annotation is: (let ((.cse0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset))) (and (= main_~pa~0.base |main_~#ad1~0.base|) (= main_~i~0 (select (select |#memory_int| |main_~#ad1~0.base|) (+ (* main_~i~0 8) |main_~#ad1~0.offset|))) (= (+ (* 8 .cse0) |main_~#ad1~0.offset|) main_~pa~0.offset) (<= main_~i~0 .cse0))) [2020-09-21 11:23:56,315 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 9 12) the Hoare annotation is: true [2020-09-21 11:23:56,315 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 9 12) no Hoare annotation was computed. [2020-09-21 11:23:56,315 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 9 12) no Hoare annotation was computed. [2020-09-21 11:23:56,328 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,329 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,336 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,336 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:23:56 BoogieIcfgContainer [2020-09-21 11:23:56,339 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:23:56,343 INFO L168 Benchmark]: Toolchain (without parser) took 5727.74 ms. Allocated memory was 147.3 MB in the beginning and 283.6 MB in the end (delta: 136.3 MB). Free memory was 101.9 MB in the beginning and 123.3 MB in the end (delta: -21.4 MB). Peak memory consumption was 115.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:56,344 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:23:56,345 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.75 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 101.2 MB in the beginning and 181.8 MB in the end (delta: -80.6 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:56,346 INFO L168 Benchmark]: Boogie Preprocessor took 42.66 ms. Allocated memory is still 202.9 MB. Free memory was 181.8 MB in the beginning and 179.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:56,346 INFO L168 Benchmark]: RCFGBuilder took 375.36 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 165.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:56,347 INFO L168 Benchmark]: TraceAbstraction took 4897.34 ms. Allocated memory was 202.9 MB in the beginning and 283.6 MB in the end (delta: 80.7 MB). Free memory was 164.6 MB in the beginning and 123.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:23:56,351 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 399.75 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 101.2 MB in the beginning and 181.8 MB in the end (delta: -80.6 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.66 ms. Allocated memory is still 202.9 MB. Free memory was 181.8 MB in the beginning and 179.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.36 ms. Allocated memory is still 202.9 MB. Free memory was 179.5 MB in the beginning and 165.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4897.34 ms. Allocated memory was 202.9 MB in the beginning and 283.6 MB in the end (delta: 80.7 MB). Free memory was 164.6 MB in the beginning and 123.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 122.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 36]: 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: 26]: Loop Invariant [2020-09-21 11:23:56,359 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,360 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,360 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2020-09-21 11:23:56,361 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: (pa == ad1 && unknown-#memory_int-unknown[pa][pa] * 8 + ad1 == pa) && i <= unknown-#memory_int-unknown[pa][pa] - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 12, TraceHistogramMax: 11, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 159 SDtfs, 83 SDslu, 538 SDs, 0 SdLazy, 630 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 203 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 30 NumberOfFragments, 72 HoareAnnotationTreeSize, 19 FomulaSimplifications, 311 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 301 NumberOfCodeBlocks, 301 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 289 ConstructedInterpolants, 0 QuantifiedInterpolants, 46317 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 90/440 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...