/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:40:55,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:40:55,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:40:55,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:40:55,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:40:55,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:40:55,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:40:55,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:40:55,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:40:55,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:40:55,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:40:55,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:40:55,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:40:55,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:40:55,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:40:55,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:40:55,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:40:55,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:40:55,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:40:55,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:40:55,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:40:55,929 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:40:55,930 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:40:55,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:40:55,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:40:55,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:40:55,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:40:55,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:40:55,969 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 18:40:56,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:40:56,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:40:56,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:40:56,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:40:56,008 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:40:56,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:40:56,009 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:40:56,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:40:56,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:40:56,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:40:56,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:40:56,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:40:56,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:40:56,011 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:40:56,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:40:56,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:40:56,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:40:56,012 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:40:56,012 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:40:56,012 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:40:56,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:40:56,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:40:56,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:40:56,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:40:56,013 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:40:56,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:40:56,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:40:56,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:40:56,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:40:56,014 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:40:56,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:40:56,313 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:40:56,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:40:56,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:40:56,318 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:40:56,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 18:40:56,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccdefc8d9/ca6f86f9b8eb4c00985cf262af1e4921/FLAGf739def8a [2020-08-18 18:40:56,781 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:40:56,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 18:40:56,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccdefc8d9/ca6f86f9b8eb4c00985cf262af1e4921/FLAGf739def8a [2020-08-18 18:40:57,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccdefc8d9/ca6f86f9b8eb4c00985cf262af1e4921 [2020-08-18 18:40:57,182 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:40:57,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:40:57,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:57,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:40:57,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:40:57,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e6ef35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57, skipping insertion in model container [2020-08-18 18:40:57,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:40:57,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:40:57,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:57,473 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:40:57,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:40:57,512 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:40:57,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57 WrapperNode [2020-08-18 18:40:57,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:40:57,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:40:57,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:40:57,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:40:57,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (1/1) ... [2020-08-18 18:40:57,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:40:57,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:40:57,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:40:57,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:40:57,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (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 18:40:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:40:57,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:40:57,691 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 18:40:57,692 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 18:40:57,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:40:57,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 18:40:57,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:40:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 18:40:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 18:40:57,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:40:57,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:40:57,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:40:57,955 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:40:57,956 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 18:40:57,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:57 BoogieIcfgContainer [2020-08-18 18:40:57,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:40:57,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:40:57,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:40:57,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:40:57,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:40:57" (1/3) ... [2020-08-18 18:40:57,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c87347c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:57, skipping insertion in model container [2020-08-18 18:40:57,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:40:57" (2/3) ... [2020-08-18 18:40:57,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c87347c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:40:57, skipping insertion in model container [2020-08-18 18:40:57,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:40:57" (3/3) ... [2020-08-18 18:40:57,982 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-18 18:40:57,993 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:40:58,000 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:40:58,017 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:40:58,043 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:40:58,043 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:40:58,044 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:40:58,044 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:40:58,044 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:40:58,044 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:40:58,044 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:40:58,044 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:40:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 18:40:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:40:58,074 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:58,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 18:40:58,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778686672] [2020-08-18 18:40:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,379 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 18:40:58,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778686672] [2020-08-18 18:40:58,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:58,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504216528] [2020-08-18 18:40:58,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:58,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,409 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 18:40:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,468 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 18:40:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:58,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 18:40:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,480 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:40:58,480 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 18:40:58,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 18:40:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 18:40:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:40:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:40:58,524 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 18:40:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,524 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:40:58,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:58,525 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:40:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:40:58,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:58,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:40:58,528 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 18:40:58,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463720090] [2020-08-18 18:40:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,702 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 18:40:58,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463720090] [2020-08-18 18:40:58,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:58,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752268348] [2020-08-18 18:40:58,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:58,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:58,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,711 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 18:40:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,731 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 18:40:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:58,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 18:40:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,733 INFO L225 Difference]: With dead ends: 32 [2020-08-18 18:40:58,734 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 18:40:58,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 18:40:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 18:40:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:40:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 18:40:58,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 18:40:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:58,743 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 18:40:58,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 18:40:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 18:40:58,744 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:58,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:58,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:40:58,745 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 18:40:58,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:58,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13922401] [2020-08-18 18:40:58,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:58,929 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 18:40:58,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13922401] [2020-08-18 18:40:58,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:58,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 18:40:58,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572970861] [2020-08-18 18:40:58,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:40:58,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:58,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:40:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:40:58,932 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 18:40:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:58,995 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 18:40:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:40:58,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 18:40:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:58,998 INFO L225 Difference]: With dead ends: 48 [2020-08-18 18:40:58,998 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 18:40:58,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 18:40:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 18:40:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 18:40:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:40:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 18:40:59,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 18:40:59,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:59,008 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 18:40:59,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:40:59,008 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 18:40:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:59,010 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:59,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:59,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:40:59,011 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:59,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 18:40:59,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:59,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221455541] [2020-08-18 18:40:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:40:59,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221455541] [2020-08-18 18:40:59,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:40:59,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 18:40:59,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505666682] [2020-08-18 18:40:59,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:40:59,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:59,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:40:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:59,187 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 18:40:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:59,233 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 18:40:59,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:40:59,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 18:40:59,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:59,235 INFO L225 Difference]: With dead ends: 50 [2020-08-18 18:40:59,235 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 18:40:59,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:40:59,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 18:40:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 18:40:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 18:40:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 18:40:59,251 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 18:40:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:59,252 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 18:40:59,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:40:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 18:40:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 18:40:59,256 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:59,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:59,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:40:59,261 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 18:40:59,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:59,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773473469] [2020-08-18 18:40:59,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 18:40:59,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773473469] [2020-08-18 18:40:59,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:40:59,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 18:40:59,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688003256] [2020-08-18 18:40:59,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 18:40:59,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:40:59,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 18:40:59,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 18:40:59,570 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 18:40:59,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:40:59,697 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-18 18:40:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 18:40:59,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 18:40:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:40:59,699 INFO L225 Difference]: With dead ends: 64 [2020-08-18 18:40:59,700 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 18:40:59,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 18:40:59,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 18:40:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-18 18:40:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 18:40:59,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 18:40:59,716 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 18:40:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:40:59,716 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 18:40:59,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 18:40:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 18:40:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 18:40:59,719 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:40:59,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:40:59,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:40:59,720 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:40:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:40:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 18:40:59,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:40:59,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742416550] [2020-08-18 18:40:59,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:40:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:40:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:40:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:40:59,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:40:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 18:41:00,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742416550] [2020-08-18 18:41:00,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:00,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 18:41:00,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5101355] [2020-08-18 18:41:00,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 18:41:00,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:00,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 18:41:00,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 18:41:00,051 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-18 18:41:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:00,209 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-18 18:41:00,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 18:41:00,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-18 18:41:00,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:00,212 INFO L225 Difference]: With dead ends: 72 [2020-08-18 18:41:00,212 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 18:41:00,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:00,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 18:41:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-18 18:41:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 18:41:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-18 18:41:00,230 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-18 18:41:00,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:00,233 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-18 18:41:00,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 18:41:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-18 18:41:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 18:41:00,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:00,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:00,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:41:00,238 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:00,239 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 18:41:00,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:00,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386816742] [2020-08-18 18:41:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-18 18:41:00,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386816742] [2020-08-18 18:41:00,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:00,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 18:41:00,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380216036] [2020-08-18 18:41:00,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 18:41:00,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 18:41:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 18:41:00,600 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-18 18:41:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:00,821 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-18 18:41:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 18:41:00,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-18 18:41:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:00,823 INFO L225 Difference]: With dead ends: 80 [2020-08-18 18:41:00,823 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 18:41:00,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-18 18:41:00,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 18:41:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-18 18:41:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 18:41:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 18:41:00,832 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-18 18:41:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:00,832 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 18:41:00,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 18:41:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 18:41:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 18:41:00,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:00,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:00,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:41:00,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:00,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-18 18:41:00,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:00,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931290413] [2020-08-18 18:41:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:00,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 18:41:01,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931290413] [2020-08-18 18:41:01,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:01,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 18:41:01,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897074852] [2020-08-18 18:41:01,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 18:41:01,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 18:41:01,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:41:01,282 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-18 18:41:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:01,553 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-18 18:41:01,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:41:01,553 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-18 18:41:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:01,555 INFO L225 Difference]: With dead ends: 90 [2020-08-18 18:41:01,555 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 18:41:01,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:41:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 18:41:01,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-18 18:41:01,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 18:41:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-18 18:41:01,564 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-18 18:41:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:01,564 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-18 18:41:01,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 18:41:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-18 18:41:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 18:41:01,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:01,566 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:01,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:41:01,567 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:01,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-18 18:41:01,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:01,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122018159] [2020-08-18 18:41:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:01,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-18 18:41:02,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122018159] [2020-08-18 18:41:02,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:02,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 18:41:02,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085389246] [2020-08-18 18:41:02,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 18:41:02,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 18:41:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:41:02,090 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-18 18:41:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:02,365 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-18 18:41:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:41:02,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-18 18:41:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:02,367 INFO L225 Difference]: With dead ends: 94 [2020-08-18 18:41:02,367 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 18:41:02,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:41:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 18:41:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-18 18:41:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 18:41:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-18 18:41:02,387 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-18 18:41:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:02,387 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-18 18:41:02,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 18:41:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-18 18:41:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 18:41:02,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:41:02,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:41:02,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:41:02,392 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:41:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:41:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-18 18:41:02,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:41:02,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243149089] [2020-08-18 18:41:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:41:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:41:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 18:41:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:02,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 18:41:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:41:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-18 18:41:03,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243149089] [2020-08-18 18:41:03,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:41:03,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 18:41:03,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042528260] [2020-08-18 18:41:03,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 18:41:03,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:41:03,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 18:41:03,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 18:41:03,035 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-18 18:41:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:41:03,360 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-18 18:41:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 18:41:03,361 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-18 18:41:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:41:03,362 INFO L225 Difference]: With dead ends: 82 [2020-08-18 18:41:03,362 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 18:41:03,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 18:41:03,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 18:41:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 18:41:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 18:41:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 18:41:03,367 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-18 18:41:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:41:03,367 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 18:41:03,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 18:41:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 18:41:03,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 18:41:03,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:41:03,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 18:41:03,398 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 18:41:03,399 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:41:03,399 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 18:41:03,399 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 18:41:03,399 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 18:41:03,399 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 18:41:03,399 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 18:41:03,399 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 18:41:03,400 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 18:41:03,400 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 18:41:03,400 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 18:41:03,400 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 18:41:03,400 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 18:41:03,400 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 18:41:03,400 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 18:41:03,400 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 18:41:03,401 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 18:41:03,402 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 18:41:03,402 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 18:41:03,403 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 18:41:03,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:03 BoogieIcfgContainer [2020-08-18 18:41:03,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:41:03,413 INFO L168 Benchmark]: Toolchain (without parser) took 6228.16 ms. Allocated memory was 140.5 MB in the beginning and 281.5 MB in the end (delta: 141.0 MB). Free memory was 103.8 MB in the beginning and 189.8 MB in the end (delta: -86.0 MB). Peak memory consumption was 55.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:03,414 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 18:41:03,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.82 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:03,415 INFO L168 Benchmark]: Boogie Preprocessor took 113.14 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.6 MB in the beginning and 182.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:03,416 INFO L168 Benchmark]: RCFGBuilder took 344.87 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:03,416 INFO L168 Benchmark]: TraceAbstraction took 5435.68 ms. Allocated memory was 202.9 MB in the beginning and 281.5 MB in the end (delta: 78.6 MB). Free memory was 168.1 MB in the beginning and 189.8 MB in the end (delta: -21.7 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. [2020-08-18 18:41:03,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.82 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.14 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.6 MB in the beginning and 182.0 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.87 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 168.8 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5435.68 ms. Allocated memory was 202.9 MB in the beginning and 281.5 MB in the end (delta: 78.6 MB). Free memory was 168.1 MB in the beginning and 189.8 MB in the end (delta: -21.7 MB). Peak memory consumption was 57.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 58 SDslu, 3296 SDs, 0 SdLazy, 1115 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 50267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 118/206 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...