/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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --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 0.1.25-177f698 [2020-08-21 18:16:51,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:16:51,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:16:51,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:16:51,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:16:51,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:16:51,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:16:51,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:16:51,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:16:51,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:16:51,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:16:51,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:16:51,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:16:51,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:16:51,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:16:51,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:16:51,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:16:51,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:16:51,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:16:51,889 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:16:51,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:16:51,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:16:51,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:16:51,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:16:51,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:16:51,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:16:51,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:16:51,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:16:51,909 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 [2020-08-21 18:16:51,948 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:16:51,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:16:51,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:16:51,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:16:51,950 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:16:51,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:16:51,950 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:16:51,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:16:51,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:16:51,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:16:51,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:16:51,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:16:51,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:16:51,953 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:16:51,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:16:51,953 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:16:51,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:16:51,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:16:51,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:16:51,954 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:16:51,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:16:51,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:16:51,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:16:51,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:16:51,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:16:51,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:16:51,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:16:51,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:16:51,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:16:51,956 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 -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:16:52,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:16:52,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:16:52,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:16:52,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:16:52,277 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:16:52,278 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-08-21 18:16:52,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/647c8d892/d9be7ced9f2a4cddbb4f82c9506e9d5f/FLAGd2d7641a8 [2020-08-21 18:16:52,824 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:16:52,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/jm2006.i [2020-08-21 18:16:52,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/647c8d892/d9be7ced9f2a4cddbb4f82c9506e9d5f/FLAGd2d7641a8 [2020-08-21 18:16:53,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/647c8d892/d9be7ced9f2a4cddbb4f82c9506e9d5f [2020-08-21 18:16:53,271 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:16:53,273 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:16:53,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:16:53,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:16:53,278 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:16:53,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7333e655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53, skipping insertion in model container [2020-08-21 18:16:53,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:16:53,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:16:53,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:16:53,478 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:16:53,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:16:53,506 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:16:53,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53 WrapperNode [2020-08-21 18:16:53,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:16:53,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:16:53,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:16:53,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:16:53,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (1/1) ... [2020-08-21 18:16:53,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:16:53,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:16:53,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:16:53,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:16:53,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (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 [2020-08-21 18:16:53,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:16:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:16:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 18:16:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 18:16:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:16:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:16:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 18:16:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 18:16:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 18:16:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:16:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:16:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:16:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:16:53,895 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:16:53,895 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:16:53,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:16:53 BoogieIcfgContainer [2020-08-21 18:16:53,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:16:53,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:16:53,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:16:53,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:16:53,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:16:53" (1/3) ... [2020-08-21 18:16:53,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d891b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:16:53, skipping insertion in model container [2020-08-21 18:16:53,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:16:53" (2/3) ... [2020-08-21 18:16:53,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d891b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:16:53, skipping insertion in model container [2020-08-21 18:16:53,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:16:53" (3/3) ... [2020-08-21 18:16:53,908 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-08-21 18:16:53,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:16:53,927 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:16:53,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:16:53,986 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:16:53,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:16:53,987 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:16:53,987 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:16:53,987 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:16:53,988 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:16:53,988 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:16:53,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:16:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 18:16:54,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-21 18:16:54,021 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:54,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:54,027 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash -42161200, now seen corresponding path program 1 times [2020-08-21 18:16:54,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:54,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083862263] [2020-08-21 18:16:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:54,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:54,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083862263] [2020-08-21 18:16:54,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:16:54,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:16:54,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702661175] [2020-08-21 18:16:54,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:16:54,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:54,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:16:54,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:16:54,356 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-08-21 18:16:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:54,514 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-08-21 18:16:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:54,516 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-21 18:16:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:54,525 INFO L225 Difference]: With dead ends: 49 [2020-08-21 18:16:54,526 INFO L226 Difference]: Without dead ends: 14 [2020-08-21 18:16:54,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:16:54,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-21 18:16:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-21 18:16:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-21 18:16:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-21 18:16:54,572 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-21 18:16:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:54,573 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-21 18:16:54,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:16:54,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-21 18:16:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:16:54,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:54,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:54,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:16:54,575 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:54,576 INFO L82 PathProgramCache]: Analyzing trace with hash 219103455, now seen corresponding path program 1 times [2020-08-21 18:16:54,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:54,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165429784] [2020-08-21 18:16:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:54,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:54,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165429784] [2020-08-21 18:16:54,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:54,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:16:54,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004826901] [2020-08-21 18:16:54,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:16:54,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:54,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:16:54,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:16:54,894 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-08-21 18:16:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:55,048 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-21 18:16:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:16:55,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-21 18:16:55,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:55,050 INFO L225 Difference]: With dead ends: 21 [2020-08-21 18:16:55,050 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 18:16:55,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:16:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 18:16:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 18:16:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 18:16:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-21 18:16:55,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-21 18:16:55,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:55,061 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-21 18:16:55,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:16:55,061 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-21 18:16:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 18:16:55,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:55,064 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:55,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:16:55,065 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:55,067 INFO L82 PathProgramCache]: Analyzing trace with hash -271626832, now seen corresponding path program 2 times [2020-08-21 18:16:55,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:55,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162488452] [2020-08-21 18:16:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:55,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:55,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:55,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162488452] [2020-08-21 18:16:55,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:55,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:16:55,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418146982] [2020-08-21 18:16:55,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:16:55,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:16:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:16:55,311 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-08-21 18:16:55,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:55,398 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-08-21 18:16:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:55,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-21 18:16:55,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:55,400 INFO L225 Difference]: With dead ends: 22 [2020-08-21 18:16:55,400 INFO L226 Difference]: Without dead ends: 16 [2020-08-21 18:16:55,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:16:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-21 18:16:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-21 18:16:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-21 18:16:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-21 18:16:55,406 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-21 18:16:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:55,406 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-21 18:16:55,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:16:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-21 18:16:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 18:16:55,407 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:16:55,408 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:16:55,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:16:55,408 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:16:55,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:16:55,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1695603455, now seen corresponding path program 3 times [2020-08-21 18:16:55,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:16:55,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833678026] [2020-08-21 18:16:55,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:16:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:55,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:16:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:16:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:16:55,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833678026] [2020-08-21 18:16:55,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:16:55,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:16:55,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835206991] [2020-08-21 18:16:55,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:16:55,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:16:55,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:16:55,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:16:55,597 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-08-21 18:16:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:16:55,672 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-08-21 18:16:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:16:55,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-08-21 18:16:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:16:55,673 INFO L225 Difference]: With dead ends: 16 [2020-08-21 18:16:55,673 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:16:55,674 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 [2020-08-21 18:16:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:16:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:16:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:16:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:16:55,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-21 18:16:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:16:55,675 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:16:55,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:16:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:16:55,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:16:55,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:16:55,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:16:55,743 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:16:55,743 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:16:55,743 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:16:55,743 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:16:55,743 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:16:55,744 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:16:55,744 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-21 18:16:55,744 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-21 18:16:55,744 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-21 18:16:55,744 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-21 18:16:55,744 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 28) the Hoare annotation is: true [2020-08-21 18:16:55,745 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (= main_~y~0 0) [2020-08-21 18:16:55,745 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 28) no Hoare annotation was computed. [2020-08-21 18:16:55,745 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-21 18:16:55,745 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))) [2020-08-21 18:16:55,745 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 18:16:55,746 INFO L268 CegarLoopResult]: For program point L20-3(lines 13 28) no Hoare annotation was computed. [2020-08-21 18:16:55,746 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 28) no Hoare annotation was computed. [2020-08-21 18:16:55,746 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-21 18:16:55,746 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-21 18:16:55,746 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 18:16:55,746 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-21 18:16:55,747 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-21 18:16:55,747 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-21 18:16:55,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:16:55 BoogieIcfgContainer [2020-08-21 18:16:55,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:16:55,768 INFO L168 Benchmark]: Toolchain (without parser) took 2494.15 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 102.6 MB in the beginning and 139.5 MB in the end (delta: -37.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:55,769 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:16:55,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.73 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:55,771 INFO L168 Benchmark]: Boogie Preprocessor took 114.89 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:55,772 INFO L168 Benchmark]: RCFGBuilder took 277.00 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 167.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:55,773 INFO L168 Benchmark]: TraceAbstraction took 1864.50 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.0 MB in the beginning and 139.5 MB in the end (delta: 27.5 MB). Peak memory consumption was 60.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:16:55,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 232.73 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 92.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.89 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.4 MB in the beginning and 181.4 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 277.00 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 167.7 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1864.50 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 167.0 MB in the beginning and 139.5 MB in the end (delta: 27.5 MB). Peak memory consumption was 60.5 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: 1.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 31 SDslu, 194 SDs, 0 SdLazy, 150 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s 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, 18 NumberOfFragments, 23 HoareAnnotationTreeSize, 11 FomulaSimplifications, 96 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 54 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 4275 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...