/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 SequenceOfStatements --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=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:23:45,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:23:45,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:23:45,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:23:45,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:23:45,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:23:45,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:23:45,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:23:45,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:23:45,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:23:45,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:23:45,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:23:45,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:23:45,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:23:45,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:23:45,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:23:45,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:23:45,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:23:45,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:23:45,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:23:45,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:23:45,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:23:45,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:23:45,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:23:45,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:23:45,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:23:45,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:23:45,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:23:45,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:23:45,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:23:45,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:23:45,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:23:45,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:23:45,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:23:45,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:23:45,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:23:45,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:23:45,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:23:45,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:23:45,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:23:45,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:23:45,285 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 [2020-10-12 16:23:45,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:23:45,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:23:45,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:23:45,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:23:45,308 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:23:45,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:23:45,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:23:45,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:23:45,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:23:45,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:23:45,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:23:45,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:23:45,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:23:45,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:23:45,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:23:45,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:23:45,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:23:45,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:23:45,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:23:45,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:23:45,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:23:45,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:23:45,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:23:45,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:23:45,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:23:45,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:23:45,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:23:45,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:23:45,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:23:45,313 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 -> SequenceOfStatements 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:23:45,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:23:45,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:23:45,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:23:45,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:23:45,644 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:23:45,645 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2020-10-12 16:23:45,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4795c4b0e/2bc55316863c4914bccbccce26c37ca2/FLAG66fca97ab [2020-10-12 16:23:46,189 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:23:46,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c11.c [2020-10-12 16:23:46,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4795c4b0e/2bc55316863c4914bccbccce26c37ca2/FLAG66fca97ab [2020-10-12 16:23:46,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4795c4b0e/2bc55316863c4914bccbccce26c37ca2 [2020-10-12 16:23:46,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:23:46,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:23:46,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:23:46,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:23:46,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:23:46,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6266eb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46, skipping insertion in model container [2020-10-12 16:23:46,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:23:46,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:23:46,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:23:46,786 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:23:46,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:23:46,813 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:23:46,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46 WrapperNode [2020-10-12 16:23:46,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:23:46,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:23:46,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:23:46,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:23:46,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,928 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (1/1) ... [2020-10-12 16:23:46,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:23:46,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:23:46,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:23:46,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:23:46,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (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 [2020-10-12 16:23:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:23:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:23:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:23:46,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:23:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:23:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:23:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 16:23:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:23:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:23:47,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:23:47,184 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:23:47,184 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:23:47,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:23:47 BoogieIcfgContainer [2020-10-12 16:23:47,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:23:47,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:23:47,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:23:47,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:23:47,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:23:46" (1/3) ... [2020-10-12 16:23:47,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a5ab00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:23:47, skipping insertion in model container [2020-10-12 16:23:47,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:23:46" (2/3) ... [2020-10-12 16:23:47,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a5ab00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:23:47, skipping insertion in model container [2020-10-12 16:23:47,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:23:47" (3/3) ... [2020-10-12 16:23:47,198 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c11.c [2020-10-12 16:23:47,210 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:23:47,217 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:23:47,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:23:47,260 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:23:47,260 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:23:47,260 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:23:47,260 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:23:47,260 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:23:47,261 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:23:47,261 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:23:47,261 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:23:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-12 16:23:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:23:47,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:47,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:47,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:47,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-10-12 16:23:47,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:47,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480755458] [2020-10-12 16:23:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:47,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:47,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:47,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:47,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:23:47,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:23:47,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 16:23:47,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:47,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:23:47,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:47,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:23:47,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:23:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:47,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:47,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:47,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:47,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:23:47,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:47,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:47,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:47,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:47,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480755458] [2020-10-12 16:23:47,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:23:47,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:23:47,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766229836] [2020-10-12 16:23:47,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:23:47,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:47,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:23:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:23:47,748 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-10-12 16:23:47,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:47,836 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-10-12 16:23:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:23:47,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:23:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:47,846 INFO L225 Difference]: With dead ends: 46 [2020-10-12 16:23:47,846 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:23:47,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:23:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:23:47,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-12 16:23:47,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:23:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-12 16:23:47,883 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-12 16:23:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:47,884 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-12 16:23:47,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:23:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-12 16:23:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 16:23:47,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:47,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:47,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:23:47,886 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1776138601, now seen corresponding path program 1 times [2020-10-12 16:23:47,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:47,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814558269] [2020-10-12 16:23:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:47,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 16:23:48,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-12 16:23:48,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:23:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:23:48,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:48,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:48,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:23:48,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:48,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:48,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:48,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 16:23:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:48,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814558269] [2020-10-12 16:23:48,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:48,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:23:48,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21550146] [2020-10-12 16:23:48,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:23:48,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:23:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:23:48,234 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 6 states. [2020-10-12 16:23:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:48,287 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-12 16:23:48,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:23:48,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 16:23:48,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:48,289 INFO L225 Difference]: With dead ends: 24 [2020-10-12 16:23:48,289 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:23:48,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:23:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:23:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-10-12 16:23:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:23:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-12 16:23:48,296 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-10-12 16:23:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:48,296 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-12 16:23:48,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:23:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-12 16:23:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:23:48,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:48,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:48,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:23:48,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash 199799702, now seen corresponding path program 2 times [2020-10-12 16:23:48,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:48,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426050497] [2020-10-12 16:23:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:23:48,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-12 16:23:48,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:23:48,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:48,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:23:48,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:48,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:48,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:48,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:48,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:48,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:23:48,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:48,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:48,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:48,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:23:48,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:48,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426050497] [2020-10-12 16:23:48,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:48,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:23:48,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735475441] [2020-10-12 16:23:48,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:23:48,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:48,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:23:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:23:48,705 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2020-10-12 16:23:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:48,789 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-12 16:23:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:23:48,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-12 16:23:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:48,792 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:23:48,792 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:23:48,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:23:48,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:23:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-12 16:23:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:23:48,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-12 16:23:48,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-10-12 16:23:48,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:48,804 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-12 16:23:48,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:23:48,804 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-12 16:23:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:23:48,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:48,806 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:48,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:23:48,806 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1443974601, now seen corresponding path program 3 times [2020-10-12 16:23:48,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:48,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805296323] [2020-10-12 16:23:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:48,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:49,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:23:49,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:49,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-12 16:23:49,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:49,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:23:49,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:49,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:23:49,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:49,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:49,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:49,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:49,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:49,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805296323] [2020-10-12 16:23:49,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:49,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:23:49,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635430605] [2020-10-12 16:23:49,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:23:49,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:49,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:23:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:23:49,203 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-10-12 16:23:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:49,278 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-12 16:23:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:23:49,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-12 16:23:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:49,280 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:23:49,280 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:23:49,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:23:49,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:23:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-12 16:23:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:23:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-12 16:23:49,288 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2020-10-12 16:23:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:49,288 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-12 16:23:49,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:23:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-12 16:23:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:23:49,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:49,289 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:49,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:23:49,290 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:49,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:49,290 INFO L82 PathProgramCache]: Analyzing trace with hash 92873718, now seen corresponding path program 4 times [2020-10-12 16:23:49,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:49,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946427708] [2020-10-12 16:23:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:49,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:49,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:23:49,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:49,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-12 16:23:49,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:49,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:23:49,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:49,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:23:49,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:49,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:49,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:49,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:49,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:49,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:49,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:23:49,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:49,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:49,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:23:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:49,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946427708] [2020-10-12 16:23:49,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:49,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:23:49,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970134028] [2020-10-12 16:23:49,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:23:49,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:49,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:23:49,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:23:49,661 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-10-12 16:23:49,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:49,777 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-10-12 16:23:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:23:49,778 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 16:23:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:49,779 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:23:49,780 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:23:49,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:23:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:23:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-12 16:23:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:23:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-12 16:23:49,791 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2020-10-12 16:23:49,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:49,792 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-12 16:23:49,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:23:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-12 16:23:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:23:49,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:23:49,807 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:23:49,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:23:49,810 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:23:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:23:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -10230313, now seen corresponding path program 5 times [2020-10-12 16:23:49,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:23:49,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460387894] [2020-10-12 16:23:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:23:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:49,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:50,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:50,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:23:50,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:50,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-12 16:23:50,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:23:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:23:50,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:23:50,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:50,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:23:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:23:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:23:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:23:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:23:50,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:23:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:23:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:23:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:23:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:23:50,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:23:50,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:23:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:23:50,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460387894] [2020-10-12 16:23:50,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:23:50,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:23:50,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319169485] [2020-10-12 16:23:50,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:23:50,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:23:50,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:23:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:23:50,220 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-10-12 16:23:50,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:23:50,298 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-12 16:23:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:23:50,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-12 16:23:50,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:23:50,300 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:23:50,300 INFO L226 Difference]: Without dead ends: 0 [2020-10-12 16:23:50,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:23:50,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-12 16:23:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-12 16:23:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-12 16:23:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-12 16:23:50,306 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-10-12 16:23:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:23:50,306 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-12 16:23:50,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:23:50,306 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-12 16:23:50,307 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-12 16:23:50,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:23:50,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-12 16:23:50,461 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-12 16:23:50,462 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:23:50,462 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-12 16:23:50,462 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-12 16:23:50,462 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-12 16:23:50,462 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-12 16:23:50,462 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 32) the Hoare annotation is: true [2020-10-12 16:23:50,463 INFO L268 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-12 16:23:50,463 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 32) no Hoare annotation was computed. [2020-10-12 16:23:50,463 INFO L268 CegarLoopResult]: For program point L21(lines 21 22) no Hoare annotation was computed. [2020-10-12 16:23:50,463 INFO L268 CegarLoopResult]: For program point L21-2(lines 21 22) no Hoare annotation was computed. [2020-10-12 16:23:50,463 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 27) the Hoare annotation is: (and (< 0 (+ (div main_~len~0 4294967296) 1)) (<= main_~len~0 4)) [2020-10-12 16:23:50,464 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 27) the Hoare annotation is: (< main_~len~0 (+ (* 4294967296 (div main_~len~0 4294967296)) 5)) [2020-10-12 16:23:50,464 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 32) no Hoare annotation was computed. [2020-10-12 16:23:50,466 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-12 16:23:50,467 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-12 16:23:50,467 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-12 16:23:50,467 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-12 16:23:50,467 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-12 16:23:50,467 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-12 16:23:50,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:23:50 BoogieIcfgContainer [2020-10-12 16:23:50,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:23:50,496 INFO L168 Benchmark]: Toolchain (without parser) took 3898.51 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.8 MB in the beginning and 145.1 MB in the end (delta: -42.3 MB). Peak memory consumption was 63.1 MB. Max. memory is 7.1 GB. [2020-10-12 16:23:50,498 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-12 16:23:50,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.67 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-10-12 16:23:50,510 INFO L168 Benchmark]: Boogie Preprocessor took 114.56 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-10-12 16:23:50,512 INFO L168 Benchmark]: RCFGBuilder took 259.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 168.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:23:50,513 INFO L168 Benchmark]: TraceAbstraction took 3301.40 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 168.3 MB in the beginning and 145.1 MB in the end (delta: 23.2 MB). Peak memory consumption was 65.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:23:50,520 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 218.67 ms. Allocated memory is still 140.0 MB. Free memory was 102.6 MB in the beginning and 93.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.56 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.0 MB in the beginning and 180.9 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 259.09 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 168.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3301.40 ms. Allocated memory was 202.9 MB in the beginning and 245.4 MB in the end (delta: 42.5 MB). Free memory was 168.3 MB in the beginning and 145.1 MB in the end (delta: 23.2 MB). Peak memory consumption was 65.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 < len / 4294967296 + 1 && len <= 4 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 42 SDslu, 313 SDs, 0 SdLazy, 234 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, 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, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 25 NumberOfFragments, 25 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 111 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 9579 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 9/75 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...