/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 -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 16:16:05,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:16:05,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:16:05,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:16:05,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:16:05,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:16:05,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:16:05,985 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:16:05,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:16:05,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:16:05,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:16:05,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:16:05,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:16:05,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:16:05,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:16:05,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:16:05,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:16:05,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:16:06,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:16:06,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:16:06,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:16:06,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:16:06,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:16:06,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:16:06,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 16:16:06,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 16:16:06,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 16:16:06,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 16:16:06,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 16:16:06,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 16:16:06,024 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 16:16:06,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 16:16:06,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 16:16:06,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 16:16:06,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 16:16:06,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 16:16:06,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 16:16:06,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 16:16:06,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:16:06,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:16:06,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:16:06,034 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 16:16:06,090 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:16:06,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:16:06,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:16:06,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:16:06,092 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:16:06,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:16:06,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:16:06,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:16:06,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:16:06,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:16:06,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:16:06,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:16:06,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:16:06,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:16:06,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:16:06,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:16:06,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:16:06,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:16:06,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:16:06,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:16:06,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:16:06,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:16:06,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:16:06,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:16:06,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:16:06,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:16:06,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:16:06,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:16:06,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:16:06,099 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 [2020-08-18 16:16:06,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:16:06,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:16:06,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:16:06,446 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:16:06,446 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:16:06,447 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 16:16:06,519 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc4104a33/dd5474b267794e60aed64ad1e61ad45a/FLAG1821c17de [2020-08-18 16:16:06,985 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:16:06,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-18 16:16:06,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc4104a33/dd5474b267794e60aed64ad1e61ad45a/FLAG1821c17de [2020-08-18 16:16:07,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cc4104a33/dd5474b267794e60aed64ad1e61ad45a [2020-08-18 16:16:07,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:16:07,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:16:07,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:16:07,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:16:07,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:16:07,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e7f3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07, skipping insertion in model container [2020-08-18 16:16:07,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:16:07,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:16:07,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:16:07,684 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:16:07,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:16:07,725 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:16:07,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07 WrapperNode [2020-08-18 16:16:07,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:16:07,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:16:07,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:16:07,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:16:07,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (1/1) ... [2020-08-18 16:16:07,879 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:16:07,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:16:07,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:16:07,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:16:07,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (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 16:16:07,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:16:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:16:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 16:16:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 16:16:07,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:16:07,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 16:16:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:16:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 16:16:07,954 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:16:07,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:16:07,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:16:08,178 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:16:08,179 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 16:16:08,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:16:08 BoogieIcfgContainer [2020-08-18 16:16:08,183 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:16:08,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:16:08,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:16:08,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:16:08,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:16:07" (1/3) ... [2020-08-18 16:16:08,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d29633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:16:08, skipping insertion in model container [2020-08-18 16:16:08,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:16:07" (2/3) ... [2020-08-18 16:16:08,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46d29633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:16:08, skipping insertion in model container [2020-08-18 16:16:08,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:16:08" (3/3) ... [2020-08-18 16:16:08,193 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-18 16:16:08,205 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:16:08,212 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:16:08,228 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:16:08,273 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:16:08,273 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:16:08,274 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:16:08,274 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:16:08,274 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:16:08,275 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:16:08,275 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:16:08,275 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:16:08,303 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 16:16:08,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 16:16:08,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:08,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:16:08,319 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 16:16:08,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:08,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522589835] [2020-08-18 16:16:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,679 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 16:16:08,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522589835] [2020-08-18 16:16:08,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:16:08,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:16:08,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516828204] [2020-08-18 16:16:08,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:16:08,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:08,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:16:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:16:08,704 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 16:16:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:08,762 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 16:16:08,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:16:08,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 16:16:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:08,773 INFO L225 Difference]: With dead ends: 40 [2020-08-18 16:16:08,773 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 16:16:08,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:16:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 16:16:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 16:16:08,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 16:16:08,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 16:16:08,824 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 16:16:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:08,825 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 16:16:08,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:16:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 16:16:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:16:08,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:08,827 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 16:16:08,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:16:08,828 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:08,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:08,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 16:16:08,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:08,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474611053] [2020-08-18 16:16:08,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:08,994 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 16:16:08,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474611053] [2020-08-18 16:16:08,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:16:08,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:16:08,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241269068] [2020-08-18 16:16:08,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:16:08,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:08,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:16:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:16:08,999 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 16:16:09,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:09,024 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 16:16:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:16:09,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 16:16:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:09,027 INFO L225 Difference]: With dead ends: 32 [2020-08-18 16:16:09,027 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 16:16:09,028 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 16:16:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 16:16:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 16:16:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 16:16:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 16:16:09,037 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 16:16:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:09,037 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 16:16:09,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:16:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 16:16:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 16:16:09,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:09,039 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 16:16:09,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:16:09,040 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 16:16:09,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:09,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536903177] [2020-08-18 16:16:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,229 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 16:16:09,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536903177] [2020-08-18 16:16:09,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:16:09,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 16:16:09,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602259310] [2020-08-18 16:16:09,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 16:16:09,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 16:16:09,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 16:16:09,232 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 16:16:09,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:09,302 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 16:16:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 16:16:09,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 16:16:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:09,304 INFO L225 Difference]: With dead ends: 48 [2020-08-18 16:16:09,304 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 16:16:09,305 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 16:16:09,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 16:16:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 16:16:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 16:16:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 16:16:09,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 16:16:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:09,315 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 16:16:09,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 16:16:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 16:16:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:16:09,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:09,317 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 16:16:09,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:16:09,318 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 16:16:09,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:09,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735394504] [2020-08-18 16:16:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,544 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 16:16:09,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735394504] [2020-08-18 16:16:09,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:16:09,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 16:16:09,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022998609] [2020-08-18 16:16:09,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 16:16:09,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 16:16:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 16:16:09,547 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 16:16:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:09,575 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 16:16:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 16:16:09,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 16:16:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:09,577 INFO L225 Difference]: With dead ends: 50 [2020-08-18 16:16:09,577 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 16:16:09,578 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 16:16:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 16:16:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 16:16:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 16:16:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 16:16:09,587 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 16:16:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:09,587 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 16:16:09,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 16:16:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 16:16:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:16:09,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:09,589 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 16:16:09,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:16:09,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 16:16:09,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:09,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029791596] [2020-08-18 16:16:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:09,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:09,802 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 16:16:09,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029791596] [2020-08-18 16:16:09,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:09,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 16:16:09,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917288098] [2020-08-18 16:16:09,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 16:16:09,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 16:16:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 16:16:09,806 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 16:16:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:09,908 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-18 16:16:09,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 16:16:09,909 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 16:16:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:09,911 INFO L225 Difference]: With dead ends: 64 [2020-08-18 16:16:09,911 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 16:16:09,912 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 16:16:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 16:16:09,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-18 16:16:09,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 16:16:09,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 16:16:09,920 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 16:16:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:09,920 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 16:16:09,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 16:16:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 16:16:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 16:16:09,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:09,922 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 16:16:09,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:16:09,922 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:09,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 16:16:09,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:09,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498379685] [2020-08-18 16:16:09,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:10,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,236 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 16:16:10,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498379685] [2020-08-18 16:16:10,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:10,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 16:16:10,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337983687] [2020-08-18 16:16:10,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 16:16:10,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 16:16:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 16:16:10,239 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-18 16:16:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:10,398 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-18 16:16:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 16:16:10,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-18 16:16:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:10,401 INFO L225 Difference]: With dead ends: 72 [2020-08-18 16:16:10,401 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 16:16:10,402 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 16:16:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 16:16:10,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-18 16:16:10,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 16:16:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-18 16:16:10,410 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-18 16:16:10,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:10,411 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-18 16:16:10,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 16:16:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-18 16:16:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 16:16:10,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:10,413 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 16:16:10,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:16:10,414 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 16:16:10,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:10,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729058242] [2020-08-18 16:16:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:10,810 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 16:16:10,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729058242] [2020-08-18 16:16:10,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:10,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 16:16:10,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928569446] [2020-08-18 16:16:10,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 16:16:10,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 16:16:10,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-18 16:16:10,813 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-18 16:16:11,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:11,045 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-18 16:16:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 16:16:11,046 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-18 16:16:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:11,047 INFO L225 Difference]: With dead ends: 80 [2020-08-18 16:16:11,047 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 16:16:11,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-18 16:16:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 16:16:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-18 16:16:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 16:16:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 16:16:11,056 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-18 16:16:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:11,056 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 16:16:11,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 16:16:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 16:16:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 16:16:11,061 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:11,062 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 16:16:11,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:16:11,062 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-18 16:16:11,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:11,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095047235] [2020-08-18 16:16:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:11,633 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 16:16:11,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095047235] [2020-08-18 16:16:11,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:11,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 16:16:11,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128940318] [2020-08-18 16:16:11,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 16:16:11,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:11,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 16:16:11,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 16:16:11,639 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-18 16:16:11,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:11,941 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-18 16:16:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 16:16:11,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-18 16:16:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:11,944 INFO L225 Difference]: With dead ends: 90 [2020-08-18 16:16:11,944 INFO L226 Difference]: Without dead ends: 70 [2020-08-18 16:16:11,946 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 16:16:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-18 16:16:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-18 16:16:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-18 16:16:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-18 16:16:11,954 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-18 16:16:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:11,955 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-18 16:16:11,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 16:16:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-18 16:16:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 16:16:11,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:11,957 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 16:16:11,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:16:11,957 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:11,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:11,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-18 16:16:11,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:11,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939479062] [2020-08-18 16:16:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,551 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 16:16:12,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939479062] [2020-08-18 16:16:12,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:12,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 16:16:12,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171374008] [2020-08-18 16:16:12,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 16:16:12,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:12,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 16:16:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 16:16:12,555 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-18 16:16:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:12,849 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-18 16:16:12,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 16:16:12,850 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-18 16:16:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:12,851 INFO L225 Difference]: With dead ends: 94 [2020-08-18 16:16:12,851 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 16:16:12,854 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 16:16:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 16:16:12,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-18 16:16:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-18 16:16:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-18 16:16:12,869 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-18 16:16:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:12,870 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-18 16:16:12,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 16:16:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-18 16:16:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 16:16:12,873 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:16:12,873 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 16:16:12,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:16:12,874 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:16:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:16:12,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-18 16:16:12,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:16:12,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504345625] [2020-08-18 16:16:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:16:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:16:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:12,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 16:16:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 16:16:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:16:13,446 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 16:16:13,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504345625] [2020-08-18 16:16:13,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 16:16:13,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 16:16:13,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614600937] [2020-08-18 16:16:13,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 16:16:13,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:16:13,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 16:16:13,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-18 16:16:13,450 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-18 16:16:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:16:13,708 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-18 16:16:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 16:16:13,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-18 16:16:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:16:13,709 INFO L225 Difference]: With dead ends: 82 [2020-08-18 16:16:13,710 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:16:13,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-18 16:16:13,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:16:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:16:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:16:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:16:13,712 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-18 16:16:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:16:13,712 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:16:13,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 16:16:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:16:13,713 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:16:13,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:16:13,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:16:13,738 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 16:16:13,738 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:16:13,739 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 16:16:13,739 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 16:16:13,739 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 16:16:13,739 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 16:16:13,739 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 16:16:13,739 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 16:16:13,739 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 16:16:13,740 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:16:13,740 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:16:13,740 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:16:13,740 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:16:13,740 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 16:16:13,740 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 16:16:13,741 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 16:16:13,741 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 16:16:13,741 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 16:16:13,741 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 16:16:13,741 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 16:16:13,741 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 16:16:13,741 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 16:16:13,742 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 16:16:13,742 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 16:16:13,742 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 16:16:13,742 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 16:16:13,742 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 16:16:13,742 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 16:16:13,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:16:13 BoogieIcfgContainer [2020-08-18 16:16:13,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:16:13,751 INFO L168 Benchmark]: Toolchain (without parser) took 6354.95 ms. Allocated memory was 148.4 MB in the beginning and 275.8 MB in the end (delta: 127.4 MB). Free memory was 104.3 MB in the beginning and 172.9 MB in the end (delta: -68.6 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:13,752 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:16:13,753 INFO L168 Benchmark]: CACSL2BoogieTranslator took 330.72 ms. Allocated memory is still 148.4 MB. Free memory was 104.1 MB in the beginning and 94.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:13,753 INFO L168 Benchmark]: Boogie Preprocessor took 151.41 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 94.7 MB in the beginning and 182.6 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:13,754 INFO L168 Benchmark]: RCFGBuilder took 304.18 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 170.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:13,755 INFO L168 Benchmark]: TraceAbstraction took 5563.72 ms. Allocated memory was 204.5 MB in the beginning and 275.8 MB in the end (delta: 71.3 MB). Free memory was 169.7 MB in the beginning and 172.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 68.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:16:13,758 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 330.72 ms. Allocated memory is still 148.4 MB. Free memory was 104.1 MB in the beginning and 94.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 151.41 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 94.7 MB in the beginning and 182.6 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.18 ms. Allocated memory is still 204.5 MB. Free memory was 182.6 MB in the beginning and 170.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5563.72 ms. Allocated memory was 204.5 MB in the beginning and 275.8 MB in the end (delta: 71.3 MB). Free memory was 169.7 MB in the beginning and 172.9 MB in the end (delta: -3.2 MB). Peak memory consumption was 68.1 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: 5.4s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.5s, 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, 3.2s 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...