/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:49:02,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:49:02,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:49:02,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 18:49:02,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 18:49:02,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 18:49:02,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 18:49:03,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 18:49:03,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 18:49:03,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 18:49:03,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 18:49:03,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 18:49:03,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:49:03,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:49:03,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:49:03,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:49:03,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:49:03,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:49:03,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:49:03,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:49:03,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:49:03,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:49:03,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:49:03,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:49:03,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 18:49:03,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 18:49:03,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 18:49:03,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 18:49:03,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 18:49:03,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 18:49:03,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 18:49:03,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 18:49:03,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 18:49:03,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 18:49:03,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 18:49:03,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 18:49:03,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 18:49:03,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 18:49:03,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:49:03,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:49:03,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:49:03,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:49:03,047 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:49:03,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:49:03,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:49:03,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:49:03,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:49:03,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:49:03,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:49:03,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:49:03,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:49:03,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:49:03,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:49:03,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:49:03,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:49:03,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:49:03,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:49:03,051 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:49:03,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:49:03,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:49:03,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:49:03,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:49:03,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:49:03,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:49:03,052 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:49:03,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:49:03,376 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:49:03,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:49:03,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:49:03,385 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:49:03,386 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-22 18:49:03,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca00a068b/df264cf303e04629ad8787ea9245ec2f/FLAG146f89bfe [2020-08-22 18:49:03,860 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:49:03,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-22 18:49:03,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca00a068b/df264cf303e04629ad8787ea9245ec2f/FLAG146f89bfe [2020-08-22 18:49:04,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca00a068b/df264cf303e04629ad8787ea9245ec2f [2020-08-22 18:49:04,243 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:49:04,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:49:04,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:04,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:49:04,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:49:04,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b03fd3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04, skipping insertion in model container [2020-08-22 18:49:04,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:49:04,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:49:04,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:04,441 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:49:04,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:04,473 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:49:04,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04 WrapperNode [2020-08-22 18:49:04,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:04,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:49:04,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:49:04,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:49:04,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... [2020-08-22 18:49:04,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:49:04,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:49:04,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:49:04,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:49:04,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 18:49:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:49:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:49:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 18:49:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 18:49:04,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:49:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 18:49:04,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:49:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 18:49:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 18:49:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:49:04,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:49:04,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:49:04,855 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:49:04,855 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:49:04,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:04 BoogieIcfgContainer [2020-08-22 18:49:04,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:49:04,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:49:04,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:49:04,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:49:04,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:49:04" (1/3) ... [2020-08-22 18:49:04,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fc9ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:04, skipping insertion in model container [2020-08-22 18:49:04,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:04" (2/3) ... [2020-08-22 18:49:04,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61fc9ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:04, skipping insertion in model container [2020-08-22 18:49:04,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:04" (3/3) ... [2020-08-22 18:49:04,869 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-22 18:49:04,880 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:49:04,889 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:49:04,905 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:49:04,934 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:49:04,934 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:49:04,934 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:49:04,934 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:49:04,935 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:49:04,935 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:49:04,935 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:49:04,935 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:49:04,957 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 18:49:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:49:04,969 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:04,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:04,971 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-08-22 18:49:05,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:05,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866478766] [2020-08-22 18:49:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:05,083 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:49:05,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866478766] [2020-08-22 18:49:05,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:05,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:05,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828700501] [2020-08-22 18:49:05,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:05,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:05,359 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-08-22 18:49:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:05,478 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-08-22 18:49:05,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:05,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:49:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:05,501 INFO L225 Difference]: With dead ends: 51 [2020-08-22 18:49:05,502 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 18:49:05,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:05,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 18:49:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 18:49:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 18:49:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-08-22 18:49:05,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-08-22 18:49:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:05,590 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-08-22 18:49:05,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-08-22 18:49:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 18:49:05,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:05,600 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, 1, 1, 1, 1, 1] [2020-08-22 18:49:05,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:49:05,602 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-08-22 18:49:05,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:05,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109436462] [2020-08-22 18:49:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:05,613 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:49:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109436462] [2020-08-22 18:49:05,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:05,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 18:49:05,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102494248] [2020-08-22 18:49:05,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 18:49:05,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:05,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 18:49:05,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 18:49:05,844 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-08-22 18:49:05,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:05,960 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-08-22 18:49:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 18:49:05,961 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-22 18:49:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:05,963 INFO L225 Difference]: With dead ends: 66 [2020-08-22 18:49:05,963 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 18:49:05,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:49:05,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 18:49:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-08-22 18:49:05,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 18:49:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-22 18:49:05,978 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-08-22 18:49:05,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:05,979 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-22 18:49:05,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 18:49:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-22 18:49:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:05,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:05,981 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:05,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:49:05,982 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:05,983 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-08-22 18:49:05,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:05,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642555516] [2020-08-22 18:49:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:06,013 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:06,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:06,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642555516] [2020-08-22 18:49:06,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:06,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:06,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903657458] [2020-08-22 18:49:06,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:06,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:06,233 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-08-22 18:49:06,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:06,321 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 18:49:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:06,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 18:49:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:06,324 INFO L225 Difference]: With dead ends: 69 [2020-08-22 18:49:06,324 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 18:49:06,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 18:49:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-08-22 18:49:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 18:49:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 18:49:06,337 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 18:49:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:06,338 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 18:49:06,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:06,338 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 18:49:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:06,340 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:06,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:49:06,340 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-08-22 18:49:06,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:06,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997287519] [2020-08-22 18:49:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:06,348 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:06,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:06,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997287519] [2020-08-22 18:49:06,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:06,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:06,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27352757] [2020-08-22 18:49:06,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:06,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:06,456 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-08-22 18:49:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:06,492 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-08-22 18:49:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 18:49:06,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-08-22 18:49:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:06,494 INFO L225 Difference]: With dead ends: 54 [2020-08-22 18:49:06,494 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 18:49:06,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 18:49:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-08-22 18:49:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 18:49:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 18:49:06,506 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-08-22 18:49:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:06,506 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 18:49:06,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 18:49:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 18:49:06,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:06,508 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:06,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 18:49:06,509 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-08-22 18:49:06,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:06,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094746274] [2020-08-22 18:49:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:06,516 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 18:49:06,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094746274] [2020-08-22 18:49:06,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:06,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 18:49:06,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828237779] [2020-08-22 18:49:06,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 18:49:06,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:06,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 18:49:06,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 18:49:06,726 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 11 states. [2020-08-22 18:49:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:06,918 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-22 18:49:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 18:49:06,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-22 18:49:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:06,920 INFO L225 Difference]: With dead ends: 90 [2020-08-22 18:49:06,920 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 18:49:06,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-08-22 18:49:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 18:49:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-08-22 18:49:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 18:49:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-08-22 18:49:06,932 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 34 [2020-08-22 18:49:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:06,932 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-08-22 18:49:06,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 18:49:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-08-22 18:49:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 18:49:06,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:06,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1] [2020-08-22 18:49:06,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 18:49:06,935 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash 830258234, now seen corresponding path program 1 times [2020-08-22 18:49:06,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:06,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177959857] [2020-08-22 18:49:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:06,943 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:06,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 18:49:07,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177959857] [2020-08-22 18:49:07,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:07,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:49:07,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659639629] [2020-08-22 18:49:07,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:49:07,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:49:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:49:07,216 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 14 states. [2020-08-22 18:49:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:07,472 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2020-08-22 18:49:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:49:07,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-08-22 18:49:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:07,474 INFO L225 Difference]: With dead ends: 104 [2020-08-22 18:49:07,474 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 18:49:07,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:49:07,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 18:49:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-08-22 18:49:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 18:49:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-08-22 18:49:07,487 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 43 [2020-08-22 18:49:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:07,488 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-08-22 18:49:07,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:49:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-08-22 18:49:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 18:49:07,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:07,490 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:07,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 18:49:07,490 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:07,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:07,491 INFO L82 PathProgramCache]: Analyzing trace with hash 444280, now seen corresponding path program 2 times [2020-08-22 18:49:07,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:07,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254725869] [2020-08-22 18:49:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:07,498 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-22 18:49:07,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254725869] [2020-08-22 18:49:07,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:07,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:49:07,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533195433] [2020-08-22 18:49:07,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:49:07,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:49:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:49:07,767 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 14 states. [2020-08-22 18:49:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:08,010 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2020-08-22 18:49:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:49:08,010 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-08-22 18:49:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:08,012 INFO L225 Difference]: With dead ends: 111 [2020-08-22 18:49:08,012 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 18:49:08,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:49:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 18:49:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-08-22 18:49:08,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 18:49:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-08-22 18:49:08,027 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2020-08-22 18:49:08,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:08,028 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-08-22 18:49:08,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:49:08,028 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-08-22 18:49:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 18:49:08,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:08,030 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:08,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 18:49:08,030 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:08,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1783783324, now seen corresponding path program 2 times [2020-08-22 18:49:08,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:08,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114867533] [2020-08-22 18:49:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:08,037 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 18:49:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 18:49:08,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114867533] [2020-08-22 18:49:08,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:08,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 18:49:08,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531830970] [2020-08-22 18:49:08,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 18:49:08,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:08,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 18:49:08,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 18:49:08,371 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 14 states. [2020-08-22 18:49:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:08,628 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2020-08-22 18:49:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 18:49:08,631 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-08-22 18:49:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:08,632 INFO L225 Difference]: With dead ends: 93 [2020-08-22 18:49:08,632 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 18:49:08,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-08-22 18:49:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 18:49:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 18:49:08,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 18:49:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 18:49:08,636 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2020-08-22 18:49:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:08,636 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 18:49:08,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 18:49:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 18:49:08,637 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 18:49:08,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 18:49:08,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 18:49:09,259 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:49:09,260 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:49:09,260 INFO L264 CegarLoopResult]: At program point id2FINAL(lines 14 19) the Hoare annotation is: (or (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|)) (and (<= 2 |id2_#res|) (<= id2_~ret~1 2) (<= |id2_#res| 2) (<= 2 id2_~ret~1)) (and (<= |id2_#res| 3) (<= 3 |id2_#res|))) [2020-08-22 18:49:09,260 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 18:49:09,260 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (or (and (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 4 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) (and (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 18:49:09,260 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 18:49:09,261 INFO L264 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: (and (<= 4 id2_~ret~1) (<= (div id2_~ret~1 4294967296) 0)) [2020-08-22 18:49:09,261 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 18:49:09,261 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (or (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0)) (and (<= 3 |id2_#t~ret1|) (<= |id2_#t~ret1| 3))) [2020-08-22 18:49:09,261 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 18:49:09,261 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (or (and (<= 4 id2_~ret~1) (<= 3 |id2_#t~ret1|) (<= (div id2_~ret~1 4294967296) 0) (<= |id2_#t~ret1| 3)) (and (<= 0 |id2_#t~ret1|) (<= |id2_#t~ret1| 0) (<= 1 id2_~ret~1) (<= id2_~ret~1 1)) (and (<= |id2_#t~ret1| 1) (<= 1 |id2_#t~ret1|) (<= id2_~ret~1 2) (<= 2 id2_~ret~1)) (and (<= 2 |id2_#t~ret1|) (<= |id2_#t~ret1| 2) (<= 3 id2_~ret~1) (<= id2_~ret~1 3))) [2020-08-22 18:49:09,261 INFO L264 CegarLoopResult]: At program point id2EXIT(lines 14 19) the Hoare annotation is: (or (and (<= |id2_#res| 0) (<= 0 |id2_#res|)) (and (<= |id2_#res| 1) (<= 1 id2_~ret~1) (<= id2_~ret~1 1) (<= 1 |id2_#res|)) (and (<= 2 |id2_#res|) (<= id2_~ret~1 2) (<= |id2_#res| 2) (<= 2 id2_~ret~1)) (and (<= |id2_#res| 3) (<= 3 |id2_#res|))) [2020-08-22 18:49:09,262 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-22 18:49:09,262 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 18:49:09,262 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 18:49:09,262 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 18:49:09,262 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 18:49:09,262 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) the Hoare annotation is: false [2020-08-22 18:49:09,263 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-22 18:49:09,263 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: false [2020-08-22 18:49:09,263 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 21 27) the Hoare annotation is: true [2020-08-22 18:49:09,263 INFO L264 CegarLoopResult]: At program point L24(lines 24 26) the Hoare annotation is: (and (<= main_~result~0 3) (< 0 (+ (div main_~result~0 4294967296) 1))) [2020-08-22 18:49:09,263 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-22 18:49:09,263 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-08-22 18:49:09,263 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (or (and (<= |main_#t~ret3| 3) (<= 3 |main_#t~ret3|)) (and (<= |main_#t~ret3| 0) (<= 0 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= |main_#t~ret3| 2)) (and (<= |main_#t~ret3| 1) (<= 1 |main_#t~ret3|))) [2020-08-22 18:49:09,264 INFO L271 CegarLoopResult]: At program point L24-2(lines 21 27) the Hoare annotation is: true [2020-08-22 18:49:09,264 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (< 0 (+ (div main_~result~0 4294967296) 1)))) (or (and (<= |main_#t~ret3| 0) (<= main_~result~0 0) (<= 0 |main_#t~ret3|) .cse0) (and (<= main_~result~0 3) .cse0 (<= |main_#t~ret3| 3) (<= 3 |main_#t~ret3|)) (and (<= 2 |main_#t~ret3|) (<= main_~result~0 2) (<= |main_#t~ret3| 2) .cse0) (and (<= |main_#t~ret3| 1) (<= main_~result~0 1) (<= 1 |main_#t~ret3|) .cse0))) [2020-08-22 18:49:09,264 INFO L264 CegarLoopResult]: At program point idFINAL(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 2 |id_#res|) (<= |id_#res| 2) (<= 2 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= |id_#res| 3) (<= 3 |id_#res|))) [2020-08-22 18:49:09,264 INFO L264 CegarLoopResult]: At program point idEXIT(lines 7 12) the Hoare annotation is: (or (and (<= |id_#res| 1) (<= id_~ret~0 1) (<= 1 |id_#res|) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 2 |id_#res|) (<= |id_#res| 2) (<= 2 id_~ret~0)) (and (<= 0 |id_#res|) (<= |id_#res| 0)) (and (<= |id_#res| 3) (<= 3 |id_#res|))) [2020-08-22 18:49:09,265 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-22 18:49:09,265 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (or (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= id_~ret~0 3)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 18:49:09,265 INFO L264 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: (or (and (<= 4 id_~ret~0) (<= (div id_~ret~0 4294967296) 0)) (and (<= id_~ret~0 2) (<= 2 id_~ret~0)) (and (<= 3 id_~ret~0) (<= id_~ret~0 3)) (and (<= id_~ret~0 1) (<= 1 id_~ret~0))) [2020-08-22 18:49:09,265 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-22 18:49:09,265 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-08-22 18:49:09,265 INFO L271 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-08-22 18:49:09,265 INFO L264 CegarLoopResult]: At program point L9-1(line 9) the Hoare annotation is: (or (and (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1)) (and (<= |id_#t~ret0| 2) (<= 2 |id_#t~ret0|)) (and (<= 3 |id_#t~ret0|) (<= |id_#t~ret0| 3)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0))) [2020-08-22 18:49:09,266 INFO L271 CegarLoopResult]: At program point L8-1(line 8) the Hoare annotation is: true [2020-08-22 18:49:09,266 INFO L264 CegarLoopResult]: At program point L9-2(line 9) the Hoare annotation is: (or (and (<= 4 id_~ret~0) (<= (div id_~ret~0 4294967296) 0) (<= 3 |id_#t~ret0|) (<= |id_#t~ret0| 3)) (and (<= |id_#t~ret0| 2) (<= 3 id_~ret~0) (<= id_~ret~0 3) (<= 2 |id_#t~ret0|)) (and (<= 0 |id_#t~ret0|) (<= |id_#t~ret0| 0) (<= id_~ret~0 1) (<= 1 id_~ret~0)) (and (<= id_~ret~0 2) (<= 1 |id_#t~ret0|) (<= |id_#t~ret0| 1) (<= 2 id_~ret~0))) [2020-08-22 18:49:09,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:49:09 BoogieIcfgContainer [2020-08-22 18:49:09,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:49:09,307 INFO L168 Benchmark]: Toolchain (without parser) took 5053.00 ms. Allocated memory was 138.4 MB in the beginning and 278.9 MB in the end (delta: 140.5 MB). Free memory was 103.0 MB in the beginning and 190.6 MB in the end (delta: -87.6 MB). Peak memory consumption was 117.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:09,308 INFO L168 Benchmark]: CDTParser took 0.76 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 18:49:09,309 INFO L168 Benchmark]: CACSL2BoogieTranslator took 229.05 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:09,310 INFO L168 Benchmark]: Boogie Preprocessor took 110.11 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:09,311 INFO L168 Benchmark]: RCFGBuilder took 275.03 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 168.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:09,314 INFO L168 Benchmark]: TraceAbstraction took 4433.71 ms. Allocated memory was 202.4 MB in the beginning and 278.9 MB in the end (delta: 76.5 MB). Free memory was 167.4 MB in the beginning and 190.6 MB in the end (delta: -23.2 MB). Peak memory consumption was 117.9 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:09,323 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 229.05 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.11 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 93.1 MB in the beginning and 181.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.03 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 168.0 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4433.71 ms. Allocated memory was 202.4 MB in the beginning and 278.9 MB in the end (delta: 76.5 MB). Free memory was 167.4 MB in the beginning and 190.6 MB in the end (delta: -23.2 MB). Peak memory consumption was 117.9 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 - ProcedureContractResult [Line: 14]: Procedure Contract for id2 Derived contract for procedure id2: (((\result <= 0 && 0 <= \result) || (((\result <= 1 && 1 <= ret) && ret <= 1) && 1 <= \result)) || (((2 <= \result && ret <= 2) && \result <= 2) && 2 <= ret)) || (\result <= 3 && 3 <= \result) - ProcedureContractResult [Line: 21]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 7]: Procedure Contract for id Derived contract for procedure id: (((((\result <= 1 && ret <= 1) && 1 <= \result) && 1 <= ret) || (((ret <= 2 && 2 <= \result) && \result <= 2) && 2 <= ret)) || (0 <= \result && \result <= 0)) || (\result <= 3 && 3 <= \result) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 330 SDtfs, 55 SDslu, 2332 SDs, 0 SdLazy, 623 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=7, 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, 8 MinimizatonAttempts, 39 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 49 PreInvPairs, 194 NumberOfFragments, 578 HoareAnnotationTreeSize, 49 FomulaSimplifications, 4504 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 38 FomulaSimplificationsInter, 178 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...