/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:15,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:15,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:15,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:15,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:15,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:15,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:15,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:15,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:15,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:15,572 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:15,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:15,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:15,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:15,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:15,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:15,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:15,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:15,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:15,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:15,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:15,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:15,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:15,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:15,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:15,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:15,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:15,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:15,608 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:15,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:15,611 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:15,612 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:15,612 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:15,613 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:15,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:15,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:15,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:15,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:15,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:15,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:15,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:15,620 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 [2020-09-21 11:32:15,659 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:15,660 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:15,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:15,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:15,662 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:15,662 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:15,662 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:15,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:15,663 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:15,663 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:15,663 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:15,663 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:15,663 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:15,664 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:15,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:15,664 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:15,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:15,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:15,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:15,665 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:15,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:15,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:15,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:15,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:15,666 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:15,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:15,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:15,667 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:15,667 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:15,667 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:32:16,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:16,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:16,143 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:16,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:16,145 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:16,146 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-09-21 11:32:16,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21086f512/7361c0876a9e4e8b8e190f1c704752ce/FLAGbf9120648 [2020-09-21 11:32:16,784 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:16,785 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/jm2006.i [2020-09-21 11:32:16,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21086f512/7361c0876a9e4e8b8e190f1c704752ce/FLAGbf9120648 [2020-09-21 11:32:17,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/21086f512/7361c0876a9e4e8b8e190f1c704752ce [2020-09-21 11:32:17,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:17,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:17,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:17,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:17,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:17,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44fd9ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17, skipping insertion in model container [2020-09-21 11:32:17,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:17,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:17,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:17,405 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:17,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:17,437 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:17,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17 WrapperNode [2020-09-21 11:32:17,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:17,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:17,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:17,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:17,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (1/1) ... [2020-09-21 11:32:17,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:17,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:17,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:17,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:17,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (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 [2020-09-21 11:32:17,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:32:17,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:32:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:32:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:17,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:32:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:17,865 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:17,865 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:32:17,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:17 BoogieIcfgContainer [2020-09-21 11:32:17,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:17,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:17,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:17,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:17,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:17" (1/3) ... [2020-09-21 11:32:17,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e4487f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:17, skipping insertion in model container [2020-09-21 11:32:17,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:17" (2/3) ... [2020-09-21 11:32:17,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e4487f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:17, skipping insertion in model container [2020-09-21 11:32:17,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:17" (3/3) ... [2020-09-21 11:32:17,886 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-09-21 11:32:17,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:17,942 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:17,969 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:18,011 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:18,011 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:18,011 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:18,011 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:18,011 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:18,011 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:18,012 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:18,012 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 11:32:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:32:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:18,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:18,040 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:18,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:18,046 INFO L82 PathProgramCache]: Analyzing trace with hash -42161200, now seen corresponding path program 1 times [2020-09-21 11:32:18,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:18,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007186138] [2020-09-21 11:32:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:18,259 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:18,259 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -1 [2020-09-21 11:32:18,259 FATAL L256 erpolLogProxyWrapper]: Difference in width: 1 [2020-09-21 11:32:18,259 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:18,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:32:18,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:18,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-21 11:32:18,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:18,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:32:18,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:18,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:32:18,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:18,464 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-09-21 11:32:18,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:18,586 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:18,587 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:18,587 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:18,588 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:18,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:18,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:18,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:18,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:18,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:18,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:18,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:18,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:18,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007186138] [2020-09-21 11:32:18,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:18,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-21 11:32:18,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766229836] [2020-09-21 11:32:18,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:32:18,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:32:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:18,633 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-09-21 11:32:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:18,756 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-09-21 11:32:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:18,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-09-21 11:32:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:18,770 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:32:18,771 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 11:32:18,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 11:32:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 11:32:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 11:32:18,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-09-21 11:32:18,824 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-09-21 11:32:18,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:18,825 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-09-21 11:32:18,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:32:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-09-21 11:32:18,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:32:18,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:18,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:18,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:18,827 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 219103455, now seen corresponding path program 1 times [2020-09-21 11:32:18,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:18,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097935329] [2020-09-21 11:32:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:18,882 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:18,883 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:18,883 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:18,883 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:18,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:32:18,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:18,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-09-21 11:32:18,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:18,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:18,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:18,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:18,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,113 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2020-09-21 11:32:19,292 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 16 [2020-09-21 11:32:19,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:19,344 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:19,344 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:19,344 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:19,344 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:19,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:19,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:19,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:32:19,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:19,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:19,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:19,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:19,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097935329] [2020-09-21 11:32:19,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:19,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:19,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033340750] [2020-09-21 11:32:19,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:19,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:19,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:19,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:19,360 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-09-21 11:32:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:19,548 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-09-21 11:32:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:32:19,550 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-21 11:32:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:19,551 INFO L225 Difference]: With dead ends: 21 [2020-09-21 11:32:19,551 INFO L226 Difference]: Without dead ends: 15 [2020-09-21 11:32:19,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-09-21 11:32:19,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-09-21 11:32:19,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 11:32:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-09-21 11:32:19,562 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-09-21 11:32:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:19,562 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-09-21 11:32:19,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-09-21 11:32:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:32:19,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:19,563 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:19,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:19,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:19,564 INFO L82 PathProgramCache]: Analyzing trace with hash -271626832, now seen corresponding path program 2 times [2020-09-21 11:32:19,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:19,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140956380] [2020-09-21 11:32:19,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:19,686 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:19,687 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:19,687 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:19,687 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:19,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:32:19,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:19,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-09-21 11:32:19,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:32:19,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:19,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:32:19,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-21 11:32:19,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:19,918 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:19,918 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:19,918 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:19,923 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:19,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:19,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:19,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:32:19,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:19,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:19,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:19,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:19,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:19,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140956380] [2020-09-21 11:32:19,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:19,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:32:19,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198908401] [2020-09-21 11:32:19,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:32:19,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:32:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:32:19,934 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-09-21 11:32:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:20,040 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-09-21 11:32:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:20,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-09-21 11:32:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:20,042 INFO L225 Difference]: With dead ends: 22 [2020-09-21 11:32:20,043 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 11:32:20,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:32:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 11:32:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 11:32:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 11:32:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-21 11:32:20,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-09-21 11:32:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:20,053 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-21 11:32:20,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:32:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-21 11:32:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:32:20,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:20,054 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:20,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:20,054 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:20,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1695603455, now seen corresponding path program 3 times [2020-09-21 11:32:20,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:20,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893447197] [2020-09-21 11:32:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:20,122 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:20,122 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:20,122 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:20,123 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:20,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:32:20,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:20,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:32:20,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:32:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:20,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-21 11:32:20,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:20,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:20,287 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:20,287 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:20,287 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:20,288 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:20,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:20,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:20,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:20,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:20,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:20,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:20,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:20,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:20,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893447197] [2020-09-21 11:32:20,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:20,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:32:20,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526275285] [2020-09-21 11:32:20,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:32:20,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:32:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:32:20,297 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-09-21 11:32:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:20,399 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-09-21 11:32:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:20,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-09-21 11:32:20,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:20,400 INFO L225 Difference]: With dead ends: 16 [2020-09-21 11:32:20,401 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:32:20,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:32:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:32:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:32:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:32:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:32:20,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-09-21 11:32:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:20,403 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:32:20,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:32:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:32:20,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:32:20,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:20,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:32:20,552 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:32:20,552 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:20,552 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:20,552 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:32:20,552 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:32:20,552 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:32:20,553 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:20,553 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 11:32:20,553 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:20,553 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:20,553 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 28) the Hoare annotation is: true [2020-09-21 11:32:20,553 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~y~0 0) (< 0 (+ main_~y~0 1))) [2020-09-21 11:32:20,553 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 28) no Hoare annotation was computed. [2020-09-21 11:32:20,554 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-09-21 11:32:20,554 INFO L264 CegarLoopResult]: At program point L20-2(lines 20 23) the Hoare annotation is: (let ((.cse1 (+ main_~y~0 main_~i~0)) (.cse0 (+ main_~x~0 main_~j~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-09-21 11:32:20,554 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-21 11:32:20,554 INFO L268 CegarLoopResult]: For program point L20-3(lines 13 28) no Hoare annotation was computed. [2020-09-21 11:32:20,554 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 28) no Hoare annotation was computed. [2020-09-21 11:32:20,554 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 11:32:20,554 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:20,555 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 11:32:20,555 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 11:32:20,555 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:20,555 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 11:32:20,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:32:20 BoogieIcfgContainer [2020-09-21 11:32:20,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:32:20,579 INFO L168 Benchmark]: Toolchain (without parser) took 3452.02 ms. Allocated memory was 140.0 MB in the beginning and 234.9 MB in the end (delta: 94.9 MB). Free memory was 103.6 MB in the beginning and 85.0 MB in the end (delta: 18.6 MB). Peak memory consumption was 113.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:20,580 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:32:20,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.13 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:20,582 INFO L168 Benchmark]: Boogie Preprocessor took 108.92 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.6 MB in the beginning and 182.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:20,583 INFO L168 Benchmark]: RCFGBuilder took 322.83 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:20,584 INFO L168 Benchmark]: TraceAbstraction took 2704.22 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 168.5 MB in the beginning and 85.0 MB in the end (delta: 83.5 MB). Peak memory consumption was 115.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:20,588 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.13 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.92 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 93.6 MB in the beginning and 182.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 322.83 ms. Allocated memory is still 202.9 MB. Free memory was 182.9 MB in the beginning and 169.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2704.22 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 168.5 MB in the beginning and 85.0 MB in the end (delta: 83.5 MB). Peak memory consumption was 115.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 20]: Loop Invariant Derived loop invariant: x + j <= y + i && y + i <= x + j - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 29 SDslu, 173 SDs, 0 SdLazy, 144 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 17 NumberOfFragments, 29 HoareAnnotationTreeSize, 11 FomulaSimplifications, 82 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 87 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 4740 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/10 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...