/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:31:30,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:30,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:30,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:30,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:30,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:30,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:30,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:30,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:30,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:30,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:30,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:30,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:30,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:30,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:30,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:30,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:30,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:30,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:30,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:30,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:30,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:30,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:30,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:30,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:30,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:30,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:30,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:30,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:30,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:30,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:30,353 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:30,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:30,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:30,356 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:30,356 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:30,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:30,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:30,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:30,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:30,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:30,365 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 [2020-09-25 12:31:30,423 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:30,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:30,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:30,426 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:30,426 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:30,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:30,427 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:30,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:30,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:30,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:30,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:30,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:30,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:30,430 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:30,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:30,431 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:30,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:30,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:30,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:30,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:30,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:30,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:30,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:30,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:30,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:30,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:30,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:30,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:30,433 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:30,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:31:30,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:30,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:30,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:30,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:30,959 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:30,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 12:31:31,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b85dffae6/f832559fffd54474a3ab1757b1b2060e/FLAG73b38b69d [2020-09-25 12:31:31,549 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:31,550 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-25 12:31:31,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b85dffae6/f832559fffd54474a3ab1757b1b2060e/FLAG73b38b69d [2020-09-25 12:31:31,906 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b85dffae6/f832559fffd54474a3ab1757b1b2060e [2020-09-25 12:31:31,922 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:31,926 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:31,928 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:31,928 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:31,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:31,933 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:31" (1/1) ... [2020-09-25 12:31:31,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@180772d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:31, skipping insertion in model container [2020-09-25 12:31:31,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:31" (1/1) ... [2020-09-25 12:31:31,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:31,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:32,183 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:32,188 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:32,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:32,219 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:32,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32 WrapperNode [2020-09-25 12:31:32,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:32,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:32,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:32,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:32,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (1/1) ... [2020-09-25 12:31:32,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:32,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:32,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:32,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:32,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (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 [2020-09-25 12:31:32,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:32,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:32,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:32,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:32,613 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:32,614 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 12:31:32,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:32 BoogieIcfgContainer [2020-09-25 12:31:32,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:32,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:32,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:32,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:32,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:31" (1/3) ... [2020-09-25 12:31:32,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f260b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:32, skipping insertion in model container [2020-09-25 12:31:32,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:32" (2/3) ... [2020-09-25 12:31:32,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f260b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:32, skipping insertion in model container [2020-09-25 12:31:32,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:32" (3/3) ... [2020-09-25 12:31:32,649 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-25 12:31:32,684 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:32,711 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:32,756 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:32,785 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:32,785 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:32,785 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:32,786 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:32,786 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:32,786 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:32,786 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:32,786 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-25 12:31:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-25 12:31:32,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:32,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:32,814 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-25 12:31:32,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:32,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707335143] [2020-09-25 12:31:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:32,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 12:31:33,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:33,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-09-25 12:31:33,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 12:31:33,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:31:33,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:33,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:33,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:33,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:33,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:33,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707335143] [2020-09-25 12:31:33,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:33,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:31:33,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629158584] [2020-09-25 12:31:33,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:33,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:33,233 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-25 12:31:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:33,332 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2020-09-25 12:31:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:31:33,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-25 12:31:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:33,346 INFO L225 Difference]: With dead ends: 48 [2020-09-25 12:31:33,346 INFO L226 Difference]: Without dead ends: 24 [2020-09-25 12:31:33,351 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 [2020-09-25 12:31:33,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-25 12:31:33,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-25 12:31:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 12:31:33,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-09-25 12:31:33,392 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2020-09-25 12:31:33,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:33,393 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-09-25 12:31:33,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:33,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-09-25 12:31:33,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 12:31:33,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:33,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:33,395 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-25 12:31:33,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914613139] [2020-09-25 12:31:33,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 12:31:33,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-09-25 12:31:33,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:31:33,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:33,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:31:33,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:33,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:33,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:33,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:33,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:33,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:33,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:33,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:33,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:33,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914613139] [2020-09-25 12:31:33,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:33,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 12:31:33,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445482983] [2020-09-25 12:31:33,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:31:33,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:33,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:31:33,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:31:33,688 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-09-25 12:31:33,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:33,768 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-09-25 12:31:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:31:33,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 12:31:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:33,770 INFO L225 Difference]: With dead ends: 45 [2020-09-25 12:31:33,770 INFO L226 Difference]: Without dead ends: 29 [2020-09-25 12:31:33,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:31:33,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-25 12:31:33,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-25 12:31:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-25 12:31:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-25 12:31:33,779 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 18 [2020-09-25 12:31:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:33,780 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-25 12:31:33,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:31:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-25 12:31:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 12:31:33,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:33,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:33,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:33,782 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash 891941667, now seen corresponding path program 2 times [2020-09-25 12:31:33,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:33,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286892824] [2020-09-25 12:31:33,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:33,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 12:31:34,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:31:34,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-09-25 12:31:34,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:31:34,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:34,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 12:31:34,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:34,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:34,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286892824] [2020-09-25 12:31:34,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 12:31:34,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79649327] [2020-09-25 12:31:34,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 12:31:34,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 12:31:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 12:31:34,124 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 7 states. [2020-09-25 12:31:34,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,243 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-09-25 12:31:34,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 12:31:34,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 12:31:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,245 INFO L225 Difference]: With dead ends: 45 [2020-09-25 12:31:34,245 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 12:31:34,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 12:31:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-25 12:31:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 12:31:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-25 12:31:34,253 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 24 [2020-09-25 12:31:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,253 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-25 12:31:34,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 12:31:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-25 12:31:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-25 12:31:34,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,255 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:34,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:31:34,255 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1860713659, now seen corresponding path program 3 times [2020-09-25 12:31:34,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9110871] [2020-09-25 12:31:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 12:31:34,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:31:34,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-09-25 12:31:34,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:31:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:34,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 12:31:34,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:34,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:34,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:34,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:34,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:34,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:34,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:34,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:34,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:34,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:34,662 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:34,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9110871] [2020-09-25 12:31:34,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:34,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 12:31:34,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463900369] [2020-09-25 12:31:34,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 12:31:34,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:34,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 12:31:34,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-25 12:31:34,665 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 9 states. [2020-09-25 12:31:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:34,799 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-25 12:31:34,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 12:31:34,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-25 12:31:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:34,801 INFO L225 Difference]: With dead ends: 44 [2020-09-25 12:31:34,801 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 12:31:34,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:31:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 12:31:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 12:31:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 12:31:34,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 12:31:34,809 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2020-09-25 12:31:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:34,809 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 12:31:34,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 12:31:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 12:31:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 12:31:34,811 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:34,811 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:34,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:31:34,812 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:34,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1338804338, now seen corresponding path program 1 times [2020-09-25 12:31:34,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:34,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922727687] [2020-09-25 12:31:34,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:34,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:34,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 12:31:35,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:31:35,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-09-25 12:31:35,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:35,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 12:31:35,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:35,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:35,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:35,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:35,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:35,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:35,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:35,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:35,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922727687] [2020-09-25 12:31:35,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:35,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:31:35,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083534033] [2020-09-25 12:31:35,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:31:35,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:35,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:31:35,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:35,457 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2020-09-25 12:31:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:35,642 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-09-25 12:31:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:31:35,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-09-25 12:31:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:35,646 INFO L225 Difference]: With dead ends: 49 [2020-09-25 12:31:35,647 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 12:31:35,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:31:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 12:31:35,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-25 12:31:35,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-25 12:31:35,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-25 12:31:35,656 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 35 [2020-09-25 12:31:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:35,656 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-25 12:31:35,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:31:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-25 12:31:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 12:31:35,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:35,658 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:35,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:31:35,659 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:35,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1859782885, now seen corresponding path program 2 times [2020-09-25 12:31:35,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:35,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049591121] [2020-09-25 12:31:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:35,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:35,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 12:31:36,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:31:36,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-09-25 12:31:36,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:36,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 12:31:36,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 12:31:36,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:36,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:36,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:36,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:36,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 12:31:36,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:36,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:36,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:36,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 12:31:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 12:31:36,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049591121] [2020-09-25 12:31:36,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:36,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 12:31:36,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915801541] [2020-09-25 12:31:36,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 12:31:36,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 12:31:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-25 12:31:36,550 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2020-09-25 12:31:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:36,726 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-09-25 12:31:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 12:31:36,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-09-25 12:31:36,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:36,728 INFO L225 Difference]: With dead ends: 59 [2020-09-25 12:31:36,728 INFO L226 Difference]: Without dead ends: 54 [2020-09-25 12:31:36,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-25 12:31:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-25 12:31:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2020-09-25 12:31:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 12:31:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-25 12:31:36,736 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 40 [2020-09-25 12:31:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:36,736 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-25 12:31:36,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 12:31:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-25 12:31:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-25 12:31:36,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:36,738 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:36,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:31:36,739 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash -892978821, now seen corresponding path program 3 times [2020-09-25 12:31:36,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:36,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203553114] [2020-09-25 12:31:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:36,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-25 12:31:37,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-09-25 12:31:37,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 12:31:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 12:31:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 12:31:37,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:37,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:37,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:37,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:37,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 12:31:37,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:37,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 12:31:37,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:37,580 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:37,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:37,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:37,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:37,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:37,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203553114] [2020-09-25 12:31:37,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:37,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 12:31:37,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624741002] [2020-09-25 12:31:37,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 12:31:37,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:37,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 12:31:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:31:37,593 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 17 states. [2020-09-25 12:31:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:38,062 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-09-25 12:31:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 12:31:38,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2020-09-25 12:31:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:38,065 INFO L225 Difference]: With dead ends: 61 [2020-09-25 12:31:38,067 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 12:31:38,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-25 12:31:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 12:31:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-09-25 12:31:38,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-25 12:31:38,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-09-25 12:31:38,089 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2020-09-25 12:31:38,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:38,090 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-09-25 12:31:38,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 12:31:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-09-25 12:31:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 12:31:38,092 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:38,092 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:38,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:31:38,092 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:38,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash 586056626, now seen corresponding path program 4 times [2020-09-25 12:31:38,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:38,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672440793] [2020-09-25 12:31:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 12:31:38,115 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 12:31:38,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 12:31:38,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:31:38,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:31:38 BoogieIcfgContainer [2020-09-25 12:31:38,150 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:31:38,155 INFO L168 Benchmark]: Toolchain (without parser) took 6229.23 ms. Allocated memory was 138.9 MB in the beginning and 248.0 MB in the end (delta: 109.1 MB). Free memory was 102.5 MB in the beginning and 95.0 MB in the end (delta: 7.4 MB). Peak memory consumption was 116.5 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,161 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,162 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.60 ms. Allocated memory is still 138.9 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,163 INFO L168 Benchmark]: Boogie Preprocessor took 112.70 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.2 MB in the beginning and 181.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,164 INFO L168 Benchmark]: RCFGBuilder took 285.80 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,165 INFO L168 Benchmark]: TraceAbstraction took 5527.73 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 169.2 MB in the beginning and 95.0 MB in the end (delta: 74.2 MB). Peak memory consumption was 120.3 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:38,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 292.60 ms. Allocated memory is still 138.9 MB. Free memory was 101.9 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.70 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 92.2 MB in the beginning and 181.9 MB in the end (delta: -89.7 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 285.80 ms. Allocated memory is still 201.9 MB. Free memory was 181.9 MB in the beginning and 169.2 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5527.73 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 169.2 MB in the beginning and 95.0 MB in the end (delta: 74.2 MB). Peak memory consumption was 120.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 123 SDslu, 535 SDs, 0 SdLazy, 313 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=7, 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, 7 MinimizatonAttempts, 15 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 202 ConstructedInterpolants, 0 QuantifiedInterpolants, 15998 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 30/240 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 incorrect! Received shutdown request...