/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:12:56,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:12:56,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:12:56,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:12:56,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:12:56,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:12:56,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:12:56,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:12:56,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:12:56,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:12:56,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:12:56,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:12:56,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:12:56,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:12:56,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:12:56,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:12:56,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:12:56,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:12:56,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:12:56,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:12:56,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:12:56,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:12:56,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:12:56,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:12:56,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:12:56,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:12:56,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:12:56,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:12:56,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:12:56,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:12:56,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:12:56,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:12:56,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:12:56,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:12:56,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:12:56,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:12:56,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:12:56,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:12:56,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:12:56,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:12:56,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:12:56,632 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 [2020-09-24 18:12:56,670 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:12:56,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:12:56,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:12:56,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:12:56,672 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:12:56,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:12:56,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:12:56,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:12:56,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:12:56,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:12:56,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:12:56,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:12:56,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:12:56,676 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:12:56,676 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:12:56,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:12:56,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:12:56,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:12:56,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:12:56,677 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:12:56,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:12:56,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:12:56,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:12:56,678 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:12:56,678 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:12:56,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:12:56,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:12:56,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:12:56,679 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:12:56,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 18:12:57,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:12:57,177 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:12:57,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:12:57,185 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:12:57,185 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:12:57,186 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-24 18:12:57,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/956e59b25/07b5a818965d4101a900711ebe5153ee/FLAG711cb6e31 [2020-09-24 18:12:57,724 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:12:57,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-2.c [2020-09-24 18:12:57,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/956e59b25/07b5a818965d4101a900711ebe5153ee/FLAG711cb6e31 [2020-09-24 18:12:58,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/956e59b25/07b5a818965d4101a900711ebe5153ee [2020-09-24 18:12:58,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:12:58,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:12:58,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:12:58,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:12:58,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:12:58,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cc40f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58, skipping insertion in model container [2020-09-24 18:12:58,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:12:58,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:12:58,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:12:58,406 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:12:58,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:12:58,440 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:12:58,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58 WrapperNode [2020-09-24 18:12:58,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:12:58,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:12:58,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:12:58,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:12:58,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,530 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (1/1) ... [2020-09-24 18:12:58,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:12:58,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:12:58,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:12:58,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:12:58,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (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 [2020-09-24 18:12:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:12:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:12:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-24 18:12:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-24 18:12:58,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:12:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 18:12:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:12:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-24 18:12:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-24 18:12:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:12:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:12:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:12:58,854 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:12:58,854 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:12:58,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:12:58 BoogieIcfgContainer [2020-09-24 18:12:58,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:12:58,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:12:58,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:12:58,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:12:58,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:12:58" (1/3) ... [2020-09-24 18:12:58,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75437766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:12:58, skipping insertion in model container [2020-09-24 18:12:58,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:12:58" (2/3) ... [2020-09-24 18:12:58,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75437766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:12:58, skipping insertion in model container [2020-09-24 18:12:58,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:12:58" (3/3) ... [2020-09-24 18:12:58,872 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-2.c [2020-09-24 18:12:58,883 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:12:58,893 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:12:58,915 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:12:58,946 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:12:58,946 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:12:58,946 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:12:58,946 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:12:58,946 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:12:58,947 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:12:58,947 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:12:58,947 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:12:58,970 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-24 18:12:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 18:12:58,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:58,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:58,981 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:58,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-24 18:12:58,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:58,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145520547] [2020-09-24 18:12:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:59,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:59,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 18:12:59,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:59,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 18:12:59,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:12:59,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 18:12:59,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:12:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:59,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:59,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:12:59,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:59,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:59,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:59,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:12:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:59,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:59,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:12:59,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 18:12:59,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:12:59,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:59,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 18:12:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:12:59,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145520547] [2020-09-24 18:12:59,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:12:59,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:12:59,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611511239] [2020-09-24 18:12:59,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:12:59,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:12:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:12:59,439 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-24 18:12:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:59,559 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-24 18:12:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:12:59,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 18:12:59,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:59,574 INFO L225 Difference]: With dead ends: 58 [2020-09-24 18:12:59,574 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 18:12:59,578 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 [2020-09-24 18:12:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 18:12:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-24 18:12:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 18:12:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 18:12:59,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-24 18:12:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:59,635 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 18:12:59,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:12:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 18:12:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 18:12:59,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:59,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:59,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:12:59,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:59,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:59,639 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-24 18:12:59,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:12:59,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611612938] [2020-09-24 18:12:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:12:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:59,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 18:12:59,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:12:59,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 201 [2020-09-24 18:12:59,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:12:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 18:12:59,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:59,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 18:12:59,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:12:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:59,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:12:59,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:59,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:12:59,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:12:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:59,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:12:59,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:12:59,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:12:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:12:59,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:12:59,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:12:59,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:12:59,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:12:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 18:12:59,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:12:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:12:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:12:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:12:59,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:12:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 18:12:59,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611612938] [2020-09-24 18:12:59,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:12:59,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:12:59,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818668477] [2020-09-24 18:12:59,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:12:59,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:12:59,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:12:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:12:59,944 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-24 18:12:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:12:59,978 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-24 18:12:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:12:59,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 18:12:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:12:59,980 INFO L225 Difference]: With dead ends: 50 [2020-09-24 18:12:59,981 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 18:12:59,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:12:59,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 18:12:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 18:12:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 18:12:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-24 18:12:59,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-24 18:12:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:12:59,992 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-24 18:12:59,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:12:59,993 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-24 18:12:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 18:12:59,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:12:59,995 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:12:59,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:12:59,995 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:12:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:12:59,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-24 18:13:00,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:13:00,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140956380] [2020-09-24 18:13:00,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:13:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 18:13:00,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:13:00,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-09-24 18:13:00,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-09-24 18:13:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:13:00,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:13:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:13:00,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:13:00,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:00,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:00,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:00,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:13:00,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:13:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 18:13:00,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-09-24 18:13:00,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:13:00,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:00,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:13:00,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:00,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:13:00,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:13:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:13:00,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:00,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:00,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 18:13:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:00,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:13:00,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:00,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 18:13:00,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:00,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:13:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 18:13:00,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140956380] [2020-09-24 18:13:00,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:13:00,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 18:13:00,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583068288] [2020-09-24 18:13:00,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:13:00,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:13:00,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:13:00,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:13:00,436 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 6 states. [2020-09-24 18:13:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:13:00,520 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2020-09-24 18:13:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:13:00,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 18:13:00,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:13:00,523 INFO L225 Difference]: With dead ends: 82 [2020-09-24 18:13:00,523 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 18:13:00,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:13:00,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 18:13:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-24 18:13:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 18:13:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-09-24 18:13:00,535 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2020-09-24 18:13:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:13:00,535 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-09-24 18:13:00,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:13:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-09-24 18:13:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 18:13:00,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:13:00,538 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:13:00,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 18:13:00,538 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:13:00,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:13:00,539 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 1 times [2020-09-24 18:13:00,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:13:00,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169908817] [2020-09-24 18:13:00,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:13:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 18:13:00,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-24 18:13:00,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:13:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-24 18:13:00,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 18:13:00,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:00,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:13:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:13:00,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 18:13:00,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:00,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:00,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:00,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:13:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 18:13:00,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 18:13:00,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 18:13:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:00,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 18:13:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:00,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:00,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:13:00,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 18:13:00,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:00,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:00,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:00,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:13:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:00,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:00,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:00,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:00,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:00,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 18:13:00,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:13:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 18:13:00,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169908817] [2020-09-24 18:13:00,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:13:00,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 18:13:00,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474064369] [2020-09-24 18:13:00,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 18:13:00,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:13:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 18:13:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:13:00,907 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 9 states. [2020-09-24 18:13:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:13:01,037 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2020-09-24 18:13:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 18:13:01,038 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-09-24 18:13:01,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:13:01,040 INFO L225 Difference]: With dead ends: 65 [2020-09-24 18:13:01,041 INFO L226 Difference]: Without dead ends: 59 [2020-09-24 18:13:01,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-24 18:13:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-24 18:13:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-09-24 18:13:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 18:13:01,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-09-24 18:13:01,053 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 34 [2020-09-24 18:13:01,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:13:01,053 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-09-24 18:13:01,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 18:13:01,054 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-09-24 18:13:01,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 18:13:01,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:13:01,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:13:01,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 18:13:01,056 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:13:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:13:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash 186293384, now seen corresponding path program 1 times [2020-09-24 18:13:01,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:13:01,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048759873] [2020-09-24 18:13:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:13:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:01,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:01,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 18:13:01,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:13:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-09-24 18:13:01,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:01,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:13:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 18:13:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:13:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:01,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:13:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:01,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:01,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:13:01,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:01,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:13:01,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:01,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:01,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:01,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:13:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:01,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:01,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 18:13:01,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:13:01,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 18:13:01,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:13:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 18:13:01,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:13:01,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:01,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:01,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:01,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:01,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:01,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 18:13:01,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:13:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:01,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:13:01,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:01,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:13:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:01,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:01,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:01,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:13:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 18:13:01,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:01,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:13:01,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:13:01,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:13:01,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 18:13:01,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048759873] [2020-09-24 18:13:01,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:13:01,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 18:13:01,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548340988] [2020-09-24 18:13:01,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 18:13:01,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:13:01,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 18:13:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 18:13:01,808 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 5 states. [2020-09-24 18:13:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:13:01,871 INFO L93 Difference]: Finished difference Result 104 states and 133 transitions. [2020-09-24 18:13:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 18:13:01,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-09-24 18:13:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:13:01,873 INFO L225 Difference]: With dead ends: 104 [2020-09-24 18:13:01,873 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 18:13:01,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:13:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 18:13:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-09-24 18:13:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 18:13:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-09-24 18:13:01,884 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 35 [2020-09-24 18:13:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:13:01,884 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-09-24 18:13:01,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 18:13:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-09-24 18:13:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 18:13:01,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:13:01,887 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:13:01,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 18:13:01,888 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:13:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:13:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2026330267, now seen corresponding path program 1 times [2020-09-24 18:13:01,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:13:01,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694576271] [2020-09-24 18:13:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:13:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:01,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:01,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:02,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:06,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:06,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 18:13:06,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 18:13:06,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 18:13:06,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-24 18:13:06,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:06,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:06,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:13:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:06,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:06,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:06,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:13:06,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:06,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:13:06,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:06,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:06,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:06,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:06,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:13:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:06,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:07,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:13:07,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 18:13:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-09-24 18:13:07,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-24 18:13:07,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:07,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:07,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:07,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:07,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:13:07,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:07,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:13:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:07,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:07,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 18:13:07,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:07,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-24 18:13:07,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:07,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-24 18:13:07,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:07,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:07,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:07,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:07,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:07,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:07,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 18:13:07,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:07,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:13:07,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:13:07,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:07,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:07,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 18:13:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:07,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:07,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:07,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:07,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 18:13:07,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:07,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:07,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-09-24 18:13:07,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:07,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-24 18:13:07,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694576271] [2020-09-24 18:13:07,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:13:07,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 18:13:07,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701147984] [2020-09-24 18:13:07,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 18:13:07,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:13:07,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 18:13:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 18:13:07,430 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 6 states. [2020-09-24 18:13:07,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:13:07,496 INFO L93 Difference]: Finished difference Result 100 states and 126 transitions. [2020-09-24 18:13:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 18:13:07,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-09-24 18:13:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:13:07,498 INFO L225 Difference]: With dead ends: 100 [2020-09-24 18:13:07,498 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 18:13:07,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:13:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 18:13:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-09-24 18:13:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 18:13:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-09-24 18:13:07,507 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2020-09-24 18:13:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:13:07,508 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-09-24 18:13:07,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 18:13:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-09-24 18:13:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 18:13:07,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:13:07,510 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:13:07,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 18:13:07,511 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:13:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:13:07,511 INFO L82 PathProgramCache]: Analyzing trace with hash -945821099, now seen corresponding path program 1 times [2020-09-24 18:13:07,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:13:07,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694302816] [2020-09-24 18:13:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:13:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:09,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 18:13:09,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:13:09,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1515 [2020-09-24 18:13:09,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:09,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:13:09,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:13:09,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 18:13:09,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:13:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:09,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:09,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:13:09,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:09,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:13:09,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:09,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:09,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:09,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:09,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:09,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:13:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:09,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:10,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 18:13:10,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 18:13:10,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-09-24 18:13:10,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:10,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:13:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:13:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-09-24 18:13:10,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:10,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:10,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:10,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:10,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:10,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 18:13:10,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:13:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:13:10,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:10,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:13:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:10,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:10,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 18:13:10,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:13:10,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-09-24 18:13:10,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:10,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:10,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:13:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:10,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:10,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:10,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:10,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:10,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:13:10,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:10,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:13:10,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:10,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:13:10,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:10,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:13:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:10,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:10,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:10,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:10,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 18:13:10,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:10,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:13:10,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:10,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:10,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:10,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 18:13:10,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694302816] [2020-09-24 18:13:10,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:13:10,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:13:10,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347076468] [2020-09-24 18:13:10,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:13:10,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:13:10,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:13:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:13:10,472 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-09-24 18:13:10,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:13:10,602 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-09-24 18:13:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:13:10,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-09-24 18:13:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:13:10,604 INFO L225 Difference]: With dead ends: 66 [2020-09-24 18:13:10,604 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 18:13:10,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:13:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 18:13:10,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-09-24 18:13:10,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 18:13:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-09-24 18:13:10,613 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 52 [2020-09-24 18:13:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:13:10,613 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-09-24 18:13:10,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:13:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-09-24 18:13:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 18:13:10,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:13:10,615 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:13:10,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 18:13:10,615 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:13:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:13:10,616 INFO L82 PathProgramCache]: Analyzing trace with hash 104828256, now seen corresponding path program 1 times [2020-09-24 18:13:10,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:13:10,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100315491] [2020-09-24 18:13:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:13:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:11,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:12,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:15,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:15,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 18:13:15,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-24 18:13:15,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-24 18:13:15,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:13:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 18:13:15,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-24 18:13:15,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:15,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:13:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:15,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:15,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:15,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 18:13:15,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:15,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 18:13:15,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:15,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:13:15,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:15,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:13:15,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:15,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 18:13:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:15,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:15,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:15,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:15,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:15,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:16,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:16,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:17,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-24 18:13:17,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-24 18:13:17,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1609 [2020-09-24 18:13:17,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 18:13:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:13:17,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 18:13:17,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:17,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:17,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:17,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 18:13:17,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 18:13:17,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-09-24 18:13:17,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 18:13:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:17,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 18:13:17,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:17,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 18:13:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:17,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:17,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 18:13:17,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:17,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 18:13:17,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:17,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:13:17,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:17,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 18:13:17,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:17,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 18:13:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:17,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:17,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:17,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:17,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 18:13:17,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:17,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:13:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:17,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:17,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:17,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-24 18:13:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:13:17,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:13:17,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:13:17,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:13:17,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:13:17,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 18:13:17,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:13:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 18:13:17,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:13:17,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 18:13:17,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 18:13:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 18:13:17,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100315491] [2020-09-24 18:13:17,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 18:13:17,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 18:13:17,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368454630] [2020-09-24 18:13:17,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 18:13:17,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:13:17,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 18:13:17,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 18:13:17,559 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-09-24 18:13:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:13:17,721 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2020-09-24 18:13:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 18:13:17,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-09-24 18:13:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:13:17,722 INFO L225 Difference]: With dead ends: 60 [2020-09-24 18:13:17,722 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 18:13:17,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 18:13:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 18:13:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 18:13:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 18:13:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 18:13:17,725 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2020-09-24 18:13:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:13:17,725 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 18:13:17,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 18:13:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 18:13:17,726 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 18:13:17,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 18:13:17,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 18:13:17,985 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 18:13:17,985 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 18:13:17,985 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 18:13:17,985 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 18:13:17,985 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 18:13:17,986 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 18:13:17,986 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-09-24 18:13:17,986 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-09-24 18:13:17,986 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-09-24 18:13:17,986 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-09-24 18:13:17,986 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-09-24 18:13:17,987 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-09-24 18:13:17,987 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (= main_~x~0 2) [2020-09-24 18:13:17,987 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-09-24 18:13:17,987 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-09-24 18:13:17,987 INFO L268 CegarLoopResult]: For program point L37-2(line 37) no Hoare annotation was computed. [2020-09-24 18:13:17,987 INFO L268 CegarLoopResult]: For program point L37-3(line 37) no Hoare annotation was computed. [2020-09-24 18:13:17,987 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-09-24 18:13:17,988 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-09-24 18:13:17,988 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-09-24 18:13:17,988 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-24 18:13:17,988 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n)) [2020-09-24 18:13:17,988 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-09-24 18:13:17,988 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-09-24 18:13:17,989 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 18:13:17,989 INFO L268 CegarLoopResult]: For program point L23-4(line 23) no Hoare annotation was computed. [2020-09-24 18:13:17,989 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-09-24 18:13:17,989 INFO L268 CegarLoopResult]: For program point L23-5(line 23) no Hoare annotation was computed. [2020-09-24 18:13:17,989 INFO L268 CegarLoopResult]: For program point L23-6(line 23) no Hoare annotation was computed. [2020-09-24 18:13:17,989 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-09-24 18:13:17,990 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-09-24 18:13:17,990 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-09-24 18:13:17,990 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-09-24 18:13:17,990 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-24 18:13:17,990 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-09-24 18:13:17,991 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse0 (< 1 fibo1_~n)) (.cse1 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#t~ret0| 1) .cse0 (<= 1 |fibo1_#t~ret0|) .cse1) (and (not (= 2 |fibo1_#in~n|)) .cse0 .cse1))) [2020-09-24 18:13:17,991 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-09-24 18:13:17,991 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-09-24 18:13:17,991 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-09-24 18:13:17,991 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-24 18:13:17,992 INFO L268 CegarLoopResult]: For program point L13-4(line 13) no Hoare annotation was computed. [2020-09-24 18:13:17,992 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-09-24 18:13:17,992 INFO L268 CegarLoopResult]: For program point L13-5(line 13) no Hoare annotation was computed. [2020-09-24 18:13:17,992 INFO L268 CegarLoopResult]: For program point L13-6(line 13) no Hoare annotation was computed. [2020-09-24 18:13:17,992 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-09-24 18:13:18,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:13:18 BoogieIcfgContainer [2020-09-24 18:13:18,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:13:18,004 INFO L168 Benchmark]: Toolchain (without parser) took 19908.79 ms. Allocated memory was 136.8 MB in the beginning and 366.5 MB in the end (delta: 229.6 MB). Free memory was 100.5 MB in the beginning and 315.6 MB in the end (delta: -215.1 MB). Peak memory consumption was 245.1 MB. Max. memory is 7.1 GB. [2020-09-24 18:13:18,005 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:13:18,006 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.03 ms. Allocated memory is still 136.8 MB. Free memory was 99.8 MB in the beginning and 90.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 18:13:18,007 INFO L168 Benchmark]: Boogie Preprocessor took 108.33 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 90.3 MB in the beginning and 177.3 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 18:13:18,008 INFO L168 Benchmark]: RCFGBuilder took 311.82 ms. Allocated memory is still 198.7 MB. Free memory was 177.3 MB in the beginning and 162.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:13:18,009 INFO L168 Benchmark]: TraceAbstraction took 19137.67 ms. Allocated memory was 198.7 MB in the beginning and 366.5 MB in the end (delta: 167.8 MB). Free memory was 161.9 MB in the beginning and 315.6 MB in the end (delta: -153.7 MB). Peak memory consumption was 244.7 MB. Max. memory is 7.1 GB. [2020-09-24 18:13:18,012 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 342.03 ms. Allocated memory is still 136.8 MB. Free memory was 99.8 MB in the beginning and 90.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.33 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 90.3 MB in the beginning and 177.3 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.82 ms. Allocated memory is still 198.7 MB. Free memory was 177.3 MB in the beginning and 162.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19137.67 ms. Allocated memory was 198.7 MB in the beginning and 366.5 MB in the end (delta: 167.8 MB). Free memory was 161.9 MB in the beginning and 315.6 MB in the end (delta: -153.7 MB). Peak memory consumption was 244.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 337 SDtfs, 156 SDslu, 1090 SDs, 0 SdLazy, 375 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=6, 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, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 65 PreInvPairs, 75 NumberOfFragments, 55 HoareAnnotationTreeSize, 65 FomulaSimplifications, 127 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 65 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 289 NumberOfCodeBlocks, 289 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 281 ConstructedInterpolants, 0 QuantifiedInterpolants, 23983 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 49/68 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...