/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:02:33,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:02:33,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:02:33,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:02:33,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:02:33,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:02:33,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:02:33,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:02:33,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:02:33,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:02:33,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:02:33,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:02:33,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:02:33,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:02:33,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:02:33,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:02:33,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:02:33,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:02:33,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:02:33,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:02:33,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:02:33,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:02:33,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:02:33,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:02:33,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:02:33,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:02:33,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:02:33,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:02:33,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:02:33,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:02:33,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:02:33,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:02:33,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:02:33,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:02:33,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:02:33,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:02:33,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:02:33,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:02:33,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:02:33,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:02:33,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:02:33,199 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 17:02:33,250 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:02:33,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:02:33,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:02:33,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:02:33,252 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:02:33,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:02:33,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:02:33,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:02:33,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:02:33,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:02:33,257 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:02:33,257 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:02:33,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:02:33,257 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:02:33,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:02:33,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:02:33,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:02:33,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:02:33,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:02:33,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:02:33,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:02:33,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:02:33,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:02:33,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:02:33,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:02:33,262 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:02:33,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:02:33,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:02:33,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:02:33,263 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;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;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;log-additional-information=true; [2020-09-24 17:02:33,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:02:33,724 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:02:33,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:02:33,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:02:33,731 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:02:33,732 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2020-09-24 17:02:33,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f43a9346e/bd9e55dd72014f419a85401e76fc2f54/FLAGb396cea8c [2020-09-24 17:02:34,398 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:02:34,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2020-09-24 17:02:34,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f43a9346e/bd9e55dd72014f419a85401e76fc2f54/FLAGb396cea8c [2020-09-24 17:02:34,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f43a9346e/bd9e55dd72014f419a85401e76fc2f54 [2020-09-24 17:02:34,756 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:02:34,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:02:34,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:34,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:02:34,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:02:34,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:34" (1/1) ... [2020-09-24 17:02:34,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f58caab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:34, skipping insertion in model container [2020-09-24 17:02:34,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:02:34" (1/1) ... [2020-09-24 17:02:34,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:02:34,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:02:35,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:35,010 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:02:35,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:02:35,046 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:02:35,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35 WrapperNode [2020-09-24 17:02:35,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:02:35,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:02:35,049 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:02:35,049 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:02:35,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (1/1) ... [2020-09-24 17:02:35,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:02:35,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:02:35,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:02:35,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:02:35,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (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 17:02:35,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:02:35,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:02:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-09-24 17:02:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:02:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:02:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:02:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-09-24 17:02:35,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:02:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:02:35,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:02:35,439 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:02:35,439 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 17:02:35,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:35 BoogieIcfgContainer [2020-09-24 17:02:35,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:02:35,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:02:35,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:02:35,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:02:35,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:02:34" (1/3) ... [2020-09-24 17:02:35,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e2dd8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:35, skipping insertion in model container [2020-09-24 17:02:35,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:02:35" (2/3) ... [2020-09-24 17:02:35,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e2dd8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:02:35, skipping insertion in model container [2020-09-24 17:02:35,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:02:35" (3/3) ... [2020-09-24 17:02:35,464 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_25-1.c [2020-09-24 17:02:35,478 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:02:35,489 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:02:35,517 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:02:35,554 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:02:35,554 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:02:35,555 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:02:35,555 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:02:35,556 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:02:35,556 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:02:35,556 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:02:35,556 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:02:35,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-09-24 17:02:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 17:02:35,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:35,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:35,595 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:35,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-09-24 17:02:35,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:35,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573585582] [2020-09-24 17:02:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:35,957 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:35,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 17:02:35,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:35,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-09-24 17:02:35,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:35,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:35,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-24 17:02:35,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:35,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 17:02:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,050 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:36,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:36,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,074 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:36,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:02:36,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:02:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 17:02:36,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:36,094 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 17:02:36,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573585582] [2020-09-24 17:02:36,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:36,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:36,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543528366] [2020-09-24 17:02:36,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:36,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:36,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:36,129 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2020-09-24 17:02:36,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:36,227 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-09-24 17:02:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:36,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 17:02:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:36,251 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:02:36,251 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 17:02:36,257 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 17:02:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 17:02:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-24 17:02:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:36,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:36,313 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-09-24 17:02:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:36,313 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:36,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-24 17:02:36,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:36,316 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 17:02:36,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:02:36,317 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:36,318 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-09-24 17:02:36,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:36,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263265278] [2020-09-24 17:02:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,499 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-24 17:02:36,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-24 17:02:36,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:02:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 17:02:36,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,544 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:36,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 17:02:36,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:36,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:36,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:36,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:36,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:36,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 17:02:36,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:02:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:36,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:36,598 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 17:02:36,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263265278] [2020-09-24 17:02:36,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:02:36,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 17:02:36,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796544773] [2020-09-24 17:02:36,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:02:36,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:02:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:02:36,603 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-09-24 17:02:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:36,636 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-09-24 17:02:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:36,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-24 17:02:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:36,639 INFO L225 Difference]: With dead ends: 36 [2020-09-24 17:02:36,639 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 17:02:36,640 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 17:02:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 17:02:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 17:02:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 17:02:36,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-09-24 17:02:36,649 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-09-24 17:02:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:36,650 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-09-24 17:02:36,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:02:36,650 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-09-24 17:02:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-24 17:02:36,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:36,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-09-24 17:02:36,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:02:36,653 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-09-24 17:02:36,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:36,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652664042] [2020-09-24 17:02:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:36,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:37,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,632 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:38,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 17:02:38,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:02:38,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1965 [2020-09-24 17:02:38,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 17:02:38,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:38,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:38,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,659 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:38,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:38,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:38,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:38,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:38,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:38,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:38,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:38,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,842 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:38,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 17:02:38,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:02:38,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-09-24 17:02:38,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:38,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:38,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:38,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 17:02:38,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:38,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:38,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,883 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:38,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:38,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:38,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 17:02:38,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:38,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:38,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:02:38,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:38,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 17:02:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:38,907 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:38,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 17:02:38,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:38,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 17:02:38,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:38,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:38,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-24 17:02:38,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652664042] [2020-09-24 17:02:38,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:38,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:02:38,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711713266] [2020-09-24 17:02:38,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:02:38,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:02:38,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:02:38,945 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-09-24 17:02:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:39,089 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-09-24 17:02:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:02:39,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-24 17:02:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:39,093 INFO L225 Difference]: With dead ends: 44 [2020-09-24 17:02:39,093 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 17:02:39,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:02:39,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 17:02:39,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 17:02:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 17:02:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-09-24 17:02:39,117 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 33 [2020-09-24 17:02:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:39,118 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-09-24 17:02:39,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:02:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-09-24 17:02:39,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 17:02:39,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:39,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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 17:02:39,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:02:39,123 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 765810174, now seen corresponding path program 1 times [2020-09-24 17:02:39,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:39,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575927544] [2020-09-24 17:02:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:39,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:39,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:40,828 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:40,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 17:02:40,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:02:40,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-09-24 17:02:40,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:02:40,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-24 17:02:40,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:40,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:02:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:40,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:40,847 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:40,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 17:02:40,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:40,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 17:02:40,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:40,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:02:40,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:40,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:02:40,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:40,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-24 17:02:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:40,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:40,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:40,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,335 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:41,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 17:02:41,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:02:41,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 473 [2020-09-24 17:02:41,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:41,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:02:41,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 17:02:41,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 17:02:41,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:41,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 17:02:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,457 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:41,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:41,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:02:41,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 17:02:41,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:02:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:41,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:02:41,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:02:41,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-24 17:02:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:41,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,515 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:02:41,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-24 17:02:41,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:02:41,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-24 17:02:41,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:02:41,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:02:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:02:41,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 17:02:41,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:02:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-24 17:02:41,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575927544] [2020-09-24 17:02:41,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:02:41,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 17:02:41,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658152969] [2020-09-24 17:02:41,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:02:41,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:02:41,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:02:41,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:02:41,558 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 7 states. [2020-09-24 17:02:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:02:41,690 INFO L93 Difference]: Finished difference Result 64 states and 92 transitions. [2020-09-24 17:02:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 17:02:41,691 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-09-24 17:02:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:02:41,695 INFO L225 Difference]: With dead ends: 64 [2020-09-24 17:02:41,695 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 17:02:41,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-24 17:02:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 17:02:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-09-24 17:02:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 17:02:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2020-09-24 17:02:41,710 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 35 [2020-09-24 17:02:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:02:41,711 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2020-09-24 17:02:41,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:02:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2020-09-24 17:02:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-24 17:02:41,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:02:41,715 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:02:41,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:02:41,716 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:02:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:02:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash 809102171, now seen corresponding path program 1 times [2020-09-24 17:02:41,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:02:41,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189100420] [2020-09-24 17:02:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:02:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:02:41,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:41,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:43,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:44,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:45,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:45,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:45,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:47,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:47,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:02:48,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking...