/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:03:08,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:03:08,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:03:08,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:03:08,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:03:08,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:03:08,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:03:08,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:03:08,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:03:08,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:03:08,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:03:08,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:03:08,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:03:08,602 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:03:08,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:03:08,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:03:08,605 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:03:08,606 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:03:08,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:03:08,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:03:08,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:03:08,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:03:08,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:03:08,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:03:08,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:03:08,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:03:08,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:03:08,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:03:08,627 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 [2020-08-18 22:03:08,649 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:03:08,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:03:08,650 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:03:08,650 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:03:08,650 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:03:08,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:03:08,651 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:03:08,651 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:03:08,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:03:08,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:03:08,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:03:08,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:03:08,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:03:08,652 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:03:08,652 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:03:08,652 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:03:08,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:03:08,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:03:08,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:03:08,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:03:08,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:03:08,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:03:08,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:03:08,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:03:08,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:03:08,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:03:08,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:03:08,655 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:03:08,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:03:08,655 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=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:03:08,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:03:08,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:03:08,971 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:03:08,972 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:03:08,972 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:03:08,974 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-08-18 22:03:09,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/505861e70/3ab41a997f084918abd3c7056d0d8068/FLAG898f6029e [2020-08-18 22:03:09,493 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:03:09,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-08-18 22:03:09,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/505861e70/3ab41a997f084918abd3c7056d0d8068/FLAG898f6029e [2020-08-18 22:03:09,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/505861e70/3ab41a997f084918abd3c7056d0d8068 [2020-08-18 22:03:09,939 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:03:09,941 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:03:09,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:03:09,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:03:09,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:03:09,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:03:09" (1/1) ... [2020-08-18 22:03:09,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25df4cb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:09, skipping insertion in model container [2020-08-18 22:03:09,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:03:09" (1/1) ... [2020-08-18 22:03:09,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:03:09,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:03:10,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:03:10,136 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:03:10,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:03:10,167 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:03:10,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10 WrapperNode [2020-08-18 22:03:10,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:03:10,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:03:10,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:03:10,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:03:10,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (1/1) ... [2020-08-18 22:03:10,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:03:10,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:03:10,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:03:10,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:03:10,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (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 [2020-08-18 22:03:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:03:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:03:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:03:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:03:10,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:03:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:03:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:03:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:03:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:03:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:03:10,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:03:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:03:10,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:03:10,553 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:03:10,554 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 22:03:10,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:03:10 BoogieIcfgContainer [2020-08-18 22:03:10,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:03:10,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:03:10,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:03:10,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:03:10,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:03:09" (1/3) ... [2020-08-18 22:03:10,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874ab63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:03:10, skipping insertion in model container [2020-08-18 22:03:10,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:03:10" (2/3) ... [2020-08-18 22:03:10,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874ab63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:03:10, skipping insertion in model container [2020-08-18 22:03:10,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:03:10" (3/3) ... [2020-08-18 22:03:10,565 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-08-18 22:03:10,575 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:03:10,583 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:03:10,597 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:03:10,626 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:03:10,626 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:03:10,626 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:03:10,626 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:03:10,626 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:03:10,627 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:03:10,627 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:03:10,627 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:03:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 22:03:10,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-18 22:03:10,655 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:10,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:10,657 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-08-18 22:03:10,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:10,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399642752] [2020-08-18 22:03:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:10,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:10,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399642752] [2020-08-18 22:03:10,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:03:10,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:03:10,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481524894] [2020-08-18 22:03:10,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:03:10,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:10,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:03:10,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:03:10,861 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-08-18 22:03:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:10,890 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-08-18 22:03:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:03:10,891 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-08-18 22:03:10,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:10,898 INFO L225 Difference]: With dead ends: 34 [2020-08-18 22:03:10,898 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 22:03:10,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:03:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 22:03:10,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 22:03:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 22:03:10,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-18 22:03:10,931 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-08-18 22:03:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:10,932 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-18 22:03:10,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:03:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-18 22:03:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 22:03:10,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:10,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:10,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:03:10,933 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-08-18 22:03:10,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:10,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59283591] [2020-08-18 22:03:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:11,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59283591] [2020-08-18 22:03:11,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:11,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:03:11,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190902920] [2020-08-18 22:03:11,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:03:11,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:11,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:03:11,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:03:11,061 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-08-18 22:03:11,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:11,149 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-18 22:03:11,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:03:11,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-18 22:03:11,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:11,151 INFO L225 Difference]: With dead ends: 19 [2020-08-18 22:03:11,151 INFO L226 Difference]: Without dead ends: 14 [2020-08-18 22:03:11,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:03:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-08-18 22:03:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-08-18 22:03:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-08-18 22:03:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-08-18 22:03:11,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-08-18 22:03:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:11,158 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-08-18 22:03:11,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:03:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-08-18 22:03:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:03:11,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:11,159 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:11,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:03:11,160 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:11,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:11,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1105094223, now seen corresponding path program 2 times [2020-08-18 22:03:11,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:11,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442624747] [2020-08-18 22:03:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:11,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442624747] [2020-08-18 22:03:11,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:11,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:03:11,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565835362] [2020-08-18 22:03:11,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:03:11,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:11,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:03:11,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:03:11,257 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-08-18 22:03:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:11,327 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-08-18 22:03:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:03:11,327 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-08-18 22:03:11,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:11,328 INFO L225 Difference]: With dead ends: 20 [2020-08-18 22:03:11,328 INFO L226 Difference]: Without dead ends: 15 [2020-08-18 22:03:11,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:03:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-18 22:03:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-18 22:03:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-18 22:03:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-18 22:03:11,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-08-18 22:03:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:11,334 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-18 22:03:11,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:03:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-18 22:03:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 22:03:11,335 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:11,335 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:11,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:03:11,335 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:11,336 INFO L82 PathProgramCache]: Analyzing trace with hash -66279700, now seen corresponding path program 3 times [2020-08-18 22:03:11,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:11,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174455103] [2020-08-18 22:03:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:11,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174455103] [2020-08-18 22:03:11,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:11,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 22:03:11,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990430674] [2020-08-18 22:03:11,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 22:03:11,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:11,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 22:03:11,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:03:11,482 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-08-18 22:03:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:11,556 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-08-18 22:03:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:03:11,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-08-18 22:03:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:11,557 INFO L225 Difference]: With dead ends: 21 [2020-08-18 22:03:11,558 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 22:03:11,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:03:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 22:03:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-08-18 22:03:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-08-18 22:03:11,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-08-18 22:03:11,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-08-18 22:03:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:11,564 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-08-18 22:03:11,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 22:03:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-08-18 22:03:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 22:03:11,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:11,565 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:11,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:03:11,566 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2019132945, now seen corresponding path program 4 times [2020-08-18 22:03:11,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:11,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578649777] [2020-08-18 22:03:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:11,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578649777] [2020-08-18 22:03:11,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:11,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 22:03:11,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523584628] [2020-08-18 22:03:11,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 22:03:11,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 22:03:11,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:03:11,708 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-08-18 22:03:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:11,802 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-08-18 22:03:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:03:11,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-08-18 22:03:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:11,803 INFO L225 Difference]: With dead ends: 22 [2020-08-18 22:03:11,803 INFO L226 Difference]: Without dead ends: 17 [2020-08-18 22:03:11,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:03:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-08-18 22:03:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-08-18 22:03:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-18 22:03:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-18 22:03:11,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-08-18 22:03:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:11,812 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-18 22:03:11,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 22:03:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-18 22:03:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 22:03:11,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:11,813 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:11,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:03:11,814 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1866925900, now seen corresponding path program 5 times [2020-08-18 22:03:11,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:11,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848835765] [2020-08-18 22:03:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:03:11,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848835765] [2020-08-18 22:03:11,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:03:11,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:03:11,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083117197] [2020-08-18 22:03:11,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:03:11,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:11,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:03:11,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:03:11,972 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 11 states. [2020-08-18 22:03:12,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:12,054 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-08-18 22:03:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:03:12,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-08-18 22:03:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:12,055 INFO L225 Difference]: With dead ends: 23 [2020-08-18 22:03:12,055 INFO L226 Difference]: Without dead ends: 18 [2020-08-18 22:03:12,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:03:12,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-18 22:03:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-18 22:03:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 22:03:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-08-18 22:03:12,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-08-18 22:03:12,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:12,061 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-08-18 22:03:12,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:03:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-08-18 22:03:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 22:03:12,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:03:12,062 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:03:12,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:03:12,062 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:03:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:03:12,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2075665807, now seen corresponding path program 6 times [2020-08-18 22:03:12,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:03:12,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700540610] [2020-08-18 22:03:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:03:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:03:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:03:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-18 22:03:12,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700540610] [2020-08-18 22:03:12,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:03:12,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:03:12,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121339986] [2020-08-18 22:03:12,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:03:12,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:03:12,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:03:12,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:03:12,124 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-08-18 22:03:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:03:12,152 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-08-18 22:03:12,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:03:12,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-18 22:03:12,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:03:12,153 INFO L225 Difference]: With dead ends: 18 [2020-08-18 22:03:12,153 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:03:12,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:03:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:03:12,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:03:12,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:03:12,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:03:12,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2020-08-18 22:03:12,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:03:12,155 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:03:12,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:03:12,155 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:03:12,155 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:03:12,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:03:12,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:03:12,223 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:03:12,223 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:03:12,223 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:03:12,224 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:03:12,224 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:03:12,224 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:03:12,224 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:03:12,224 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 22:03:12,224 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:03:12,224 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:03:12,225 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-08-18 22:03:12,225 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-08-18 22:03:12,225 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-18 22:03:12,225 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 22:03:12,225 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 2) main_~y~0)) [2020-08-18 22:03:12,225 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (or (and (<= 13 main_~y~0) (<= (+ main_~x~0 65) (* 5 main_~y~0))) (and (<= 2 main_~y~0) (<= (+ main_~x~0 2) main_~y~0))) [2020-08-18 22:03:12,226 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-08-18 22:03:12,226 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 22:03:12,226 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:03:12,226 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 22:03:12,226 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 22:03:12,226 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:03:12,227 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 22:03:12,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:03:12 BoogieIcfgContainer [2020-08-18 22:03:12,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:03:12,246 INFO L168 Benchmark]: Toolchain (without parser) took 2304.52 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 103.4 MB in the beginning and 138.2 MB in the end (delta: -34.8 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:03:12,247 INFO L168 Benchmark]: CDTParser took 0.19 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. [2020-08-18 22:03:12,248 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.00 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:03:12,249 INFO L168 Benchmark]: Boogie Preprocessor took 110.05 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.8 MB in the beginning and 181.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:03:12,250 INFO L168 Benchmark]: RCFGBuilder took 279.06 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 167.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-18 22:03:12,251 INFO L168 Benchmark]: TraceAbstraction took 1684.59 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 167.5 MB in the beginning and 138.2 MB in the end (delta: 29.3 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:03:12,255 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 226.00 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.05 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 93.8 MB in the beginning and 181.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.06 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 167.5 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1684.59 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 167.5 MB in the beginning and 138.2 MB in the end (delta: 29.3 MB). Peak memory consumption was 63.4 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: 18]: Loop Invariant Derived loop invariant: x + 50 <= 0 || x + 2 <= y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 14 SDslu, 300 SDs, 0 SdLazy, 298 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 25 NumberOfFragments, 37 HoareAnnotationTreeSize, 13 FomulaSimplifications, 63 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 3623 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 21/56 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...