/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=NARROWEST --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/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:42:53,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:42:53,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:42:53,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:42:53,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:42:53,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:42:53,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:42:53,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:42:53,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:42:53,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:42:53,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:42:53,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:42:53,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:42:53,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:42:53,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:42:53,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:42:53,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:42:53,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:42:53,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:42:53,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:42:53,408 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:42:53,409 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:42:53,410 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:42:53,411 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:42:53,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:42:53,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:42:53,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:42:53,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:42:53,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:42:53,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:42:53,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:42:53,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:42:53,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:42:53,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:42:53,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:42:53,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:42:53,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:42:53,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:42:53,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:42:53,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:42:53,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:42:53,423 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 [2020-10-13 10:42:53,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:42:53,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:42:53,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:42:53,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:42:53,449 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:42:53,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:42:53,449 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:42:53,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:42:53,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:42:53,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:42:53,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:42:53,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:42:53,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:42:53,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:42:53,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:42:53,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:42:53,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:42:53,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:42:53,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:42:53,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:42:53,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:42:53,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:42:53,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:42:53,452 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:42:53,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:42:53,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:42:53,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:42:53,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:42:53,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:42:53,454 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:42:53,826 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:42:53,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:42:53,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:42:53,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:42:53,849 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:42:53,850 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-10-13 10:42:53,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14c474c81/691c369fe6344753bf4a3bd360a5b440/FLAG01a8179ea [2020-10-13 10:42:54,353 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:42:54,354 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-10-13 10:42:54,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14c474c81/691c369fe6344753bf4a3bd360a5b440/FLAG01a8179ea [2020-10-13 10:42:54,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/14c474c81/691c369fe6344753bf4a3bd360a5b440 [2020-10-13 10:42:54,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:42:54,774 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:42:54,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:54,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:42:54,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:42:54,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:54" (1/1) ... [2020-10-13 10:42:54,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231f5d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:54, skipping insertion in model container [2020-10-13 10:42:54,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:42:54" (1/1) ... [2020-10-13 10:42:54,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:42:54,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:42:54,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:54,993 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:42:55,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:42:55,024 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:42:55,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55 WrapperNode [2020-10-13 10:42:55,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:42:55,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:42:55,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:42:55,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:42:55,041 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (1/1) ... [2020-10-13 10:42:55,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:42:55,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:42:55,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:42:55,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:42:55,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (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 [2020-10-13 10:42:55,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:42:55,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:42:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:42:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:42:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:42:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:42:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:42:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:42:55,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:42:55,440 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:42:55,441 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:42:55,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:55 BoogieIcfgContainer [2020-10-13 10:42:55,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:42:55,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:42:55,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:42:55,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:42:55,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:42:54" (1/3) ... [2020-10-13 10:42:55,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c33426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:55, skipping insertion in model container [2020-10-13 10:42:55,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:42:55" (2/3) ... [2020-10-13 10:42:55,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c33426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:42:55, skipping insertion in model container [2020-10-13 10:42:55,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:42:55" (3/3) ... [2020-10-13 10:42:55,454 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-10-13 10:42:55,466 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:42:55,474 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:42:55,490 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:42:55,516 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:42:55,516 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:42:55,516 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:42:55,516 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:42:55,516 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:42:55,517 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:42:55,517 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:42:55,517 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:42:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-13 10:42:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:42:55,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:55,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:55,543 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:55,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-13 10:42:55,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:55,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682130175] [2020-10-13 10:42:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:42:55,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-13 10:42:55,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:42:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:42:55,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:42:55,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:42:55,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:55,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:55,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:55,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:55,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:55,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:55,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:55,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:55,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682130175] [2020-10-13 10:42:55,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:55,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:42:55,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619295576] [2020-10-13 10:42:55,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:42:55,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:55,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:42:55,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:55,900 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-10-13 10:42:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:55,938 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-13 10:42:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:42:55,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-13 10:42:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:55,950 INFO L225 Difference]: With dead ends: 29 [2020-10-13 10:42:55,950 INFO L226 Difference]: Without dead ends: 12 [2020-10-13 10:42:55,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:42:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-13 10:42:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-13 10:42:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-13 10:42:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-13 10:42:55,988 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-13 10:42:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:55,989 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-13 10:42:55,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:42:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-13 10:42:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 10:42:55,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:55,990 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:55,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:42:55,990 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-13 10:42:55,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:55,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300618762] [2020-10-13 10:42:55,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 10:42:56,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:56,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-13 10:42:56,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:42:56,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:42:56,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:42:56,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:56,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:56,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:56,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:56,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:42:56,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:56,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:56,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:56,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:56,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300618762] [2020-10-13 10:42:56,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:56,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:42:56,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50483766] [2020-10-13 10:42:56,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:42:56,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:56,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:42:56,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:56,377 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2020-10-13 10:42:56,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:56,398 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-13 10:42:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:42:56,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-13 10:42:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:56,400 INFO L225 Difference]: With dead ends: 18 [2020-10-13 10:42:56,400 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:42:56,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:42:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:42:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:42:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:42:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 10:42:56,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-13 10:42:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:56,409 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 10:42:56,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:42:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 10:42:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:42:56,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:56,411 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:56,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:42:56,412 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-13 10:42:56,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:56,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645294020] [2020-10-13 10:42:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:42:56,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:56,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-13 10:42:56,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:42:56,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:42:56,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:56,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:56,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:56,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:56,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:42:56,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:56,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:56,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:56,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:56,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645294020] [2020-10-13 10:42:56,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:56,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:42:56,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082831080] [2020-10-13 10:42:56,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:42:56,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:56,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:42:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:56,850 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-10-13 10:42:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:56,883 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-13 10:42:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:42:56,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-13 10:42:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:56,886 INFO L225 Difference]: With dead ends: 19 [2020-10-13 10:42:56,887 INFO L226 Difference]: Without dead ends: 14 [2020-10-13 10:42:56,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-13 10:42:56,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-13 10:42:56,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-13 10:42:56,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-13 10:42:56,900 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-13 10:42:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:56,900 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-13 10:42:56,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:42:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-13 10:42:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-13 10:42:56,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:56,902 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:56,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:42:56,902 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:56,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:56,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-13 10:42:56,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:56,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929071915] [2020-10-13 10:42:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:56,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:56,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 10:42:57,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:57,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-13 10:42:57,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:42:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:42:57,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:42:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:57,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:57,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:57,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:42:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:57,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929071915] [2020-10-13 10:42:57,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:57,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:42:57,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928671312] [2020-10-13 10:42:57,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:42:57,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:42:57,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:57,271 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-10-13 10:42:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:57,297 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-13 10:42:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:42:57,298 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-13 10:42:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:57,299 INFO L225 Difference]: With dead ends: 20 [2020-10-13 10:42:57,299 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 10:42:57,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:42:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 10:42:57,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 10:42:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 10:42:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 10:42:57,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-13 10:42:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:57,306 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 10:42:57,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:42:57,307 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 10:42:57,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:42:57,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:57,307 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:57,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:42:57,308 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:57,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:57,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-13 10:42:57,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:57,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488420467] [2020-10-13 10:42:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:42:57,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:57,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 10:42:57,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:42:57,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:42:57,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:42:57,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:57,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:42:57,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:57,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:42:57,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488420467] [2020-10-13 10:42:57,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:42:57,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:42:57,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126785929] [2020-10-13 10:42:57,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:42:57,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:42:57,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:57,560 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-13 10:42:57,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:57,597 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-13 10:42:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:42:57,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 10:42:57,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:57,599 INFO L225 Difference]: With dead ends: 21 [2020-10-13 10:42:57,599 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:42:57,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:42:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:42:57,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:42:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:42:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-13 10:42:57,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-13 10:42:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:57,605 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-13 10:42:57,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:42:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-13 10:42:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:42:57,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:42:57,607 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:42:57,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:42:57,607 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:42:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:42:57,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-13 10:42:57,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:42:57,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1805012252] [2020-10-13 10:42:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:42:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:42:57,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:42:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-13 10:42:57,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:42:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:42:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:42:57,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:42:57,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:42:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:42:57,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:42:57,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:42:57,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:42:57,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:42:57,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:42:57,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:42:57,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:42:57,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:42:57,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:42:57,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-13 10:42:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:42:57,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1805012252] [2020-10-13 10:42:57,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:42:57,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:42:57,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492259135] [2020-10-13 10:42:57,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:42:57,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:42:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:42:57,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:42:57,949 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-13 10:42:57,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:42:57,974 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-10-13 10:42:57,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:42:57,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:42:57,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:42:57,975 INFO L225 Difference]: With dead ends: 16 [2020-10-13 10:42:57,975 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:42:57,975 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 [2020-10-13 10:42:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:42:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:42:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:42:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:42:57,976 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-13 10:42:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:42:57,977 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:42:57,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:42:57,977 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:42:57,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:42:57,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:42:57,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:42:58,030 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:42:58,030 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:42:58,030 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:42:58,030 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:42:58,031 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:42:58,031 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:42:58,031 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-10-13 10:42:58,031 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-10-13 10:42:58,031 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-10-13 10:42:58,031 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (and (<= main_~y~0 0) (<= 0 main_~y~0)) (and (<= 0 main_~x~0) (<= main_~x~0 (* 4294967296 (div main_~x~0 4294967296))))) [2020-10-13 10:42:58,032 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 (* 4294967296 (div main_~x~0 4294967296)))) [2020-10-13 10:42:58,032 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-10-13 10:42:58,032 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:42:58,032 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-13 10:42:58,032 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-10-13 10:42:58,032 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-13 10:42:58,033 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-10-13 10:42:58,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:42:58 BoogieIcfgContainer [2020-10-13 10:42:58,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:42:58,056 INFO L168 Benchmark]: Toolchain (without parser) took 3281.27 ms. Allocated memory was 141.6 MB in the beginning and 245.9 MB in the end (delta: 104.3 MB). Free memory was 102.4 MB in the beginning and 208.7 MB in the end (delta: -106.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:42:58,057 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-13 10:42:58,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.78 ms. Allocated memory is still 141.6 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:58,059 INFO L168 Benchmark]: Boogie Preprocessor took 121.02 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 92.6 MB in the beginning and 179.0 MB in the end (delta: -86.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:58,059 INFO L168 Benchmark]: RCFGBuilder took 297.64 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 167.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:58,060 INFO L168 Benchmark]: TraceAbstraction took 2606.73 ms. Allocated memory was 200.3 MB in the beginning and 245.9 MB in the end (delta: 45.6 MB). Free memory was 167.1 MB in the beginning and 208.7 MB in the end (delta: -41.6 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB. [2020-10-13 10:42:58,065 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 141.6 MB. Free memory was 121.0 MB in the beginning and 120.6 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 250.78 ms. Allocated memory is still 141.6 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.02 ms. Allocated memory was 141.6 MB in the beginning and 200.3 MB in the end (delta: 58.7 MB). Free memory was 92.6 MB in the beginning and 179.0 MB in the end (delta: -86.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.64 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 167.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2606.73 ms. Allocated memory was 200.3 MB in the beginning and 245.9 MB in the end (delta: 45.6 MB). Free memory was 167.1 MB in the beginning and 208.7 MB in the end (delta: -41.6 MB). Peak memory consumption was 4.0 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: 14]: Loop Invariant Derived loop invariant: (y <= 0 && 0 <= y) || (0 <= x && x <= 4294967296 * (x / 4294967296)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 6, TraceHistogramMax: 5, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 1 SDslu, 140 SDs, 0 SdLazy, 63 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 35 HoareAnnotationTreeSize, 12 FomulaSimplifications, 93 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 75 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 2381 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 15/35 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...