/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:19:31,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:19:31,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:19:31,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:19:31,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:19:31,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:19:31,556 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:19:31,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:19:31,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:19:31,561 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:19:31,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:19:31,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:19:31,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:19:31,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:19:31,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:19:31,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:19:31,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:19:31,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:19:31,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:19:31,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:19:31,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:19:31,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:19:31,578 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:19:31,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:19:31,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:19:31,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:19:31,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:19:31,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:19:31,597 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 [2020-09-21 10:19:31,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:19:31,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:19:31,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:19:31,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:19:31,627 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:19:31,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:19:31,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:19:31,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:19:31,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:19:31,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:19:31,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:19:31,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:19:31,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:19:31,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:19:31,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:19:31,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:19:31,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:19:31,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:19:31,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:19:31,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:19:31,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:19:31,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:19:31,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:19:31,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:19:31,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:19:31,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:19:31,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:19:31,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:19:31,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:19:31,633 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 -> false [2020-09-21 10:19:32,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:19:32,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:19:32,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:19:32,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:19:32,146 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:19:32,148 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-09-21 10:19:32,245 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e697ed6b/7f5b7fdd751542d8805e18188326293a/FLAG300e9bc8f [2020-09-21 10:19:32,793 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:19:32,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-09-21 10:19:32,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e697ed6b/7f5b7fdd751542d8805e18188326293a/FLAG300e9bc8f [2020-09-21 10:19:33,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1e697ed6b/7f5b7fdd751542d8805e18188326293a [2020-09-21 10:19:33,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:19:33,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:19:33,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:33,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:19:33,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:19:33,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5401db0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33, skipping insertion in model container [2020-09-21 10:19:33,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:19:33,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:19:33,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:33,442 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:19:33,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:19:33,496 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:19:33,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33 WrapperNode [2020-09-21 10:19:33,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:19:33,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:19:33,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:19:33,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:19:33,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (1/1) ... [2020-09-21 10:19:33,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:19:33,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:19:33,531 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:19:33,531 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:19:33,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (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 [2020-09-21 10:19:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:19:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:19:33,684 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-21 10:19:33,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:19:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:19:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:19:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-21 10:19:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:19:33,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:19:33,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:19:33,870 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:19:33,870 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-21 10:19:33,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:33 BoogieIcfgContainer [2020-09-21 10:19:33,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:19:33,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:19:33,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:19:33,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:19:33,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:19:33" (1/3) ... [2020-09-21 10:19:33,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e25f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:33, skipping insertion in model container [2020-09-21 10:19:33,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:19:33" (2/3) ... [2020-09-21 10:19:33,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e25f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:19:33, skipping insertion in model container [2020-09-21 10:19:33,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:19:33" (3/3) ... [2020-09-21 10:19:33,885 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-09-21 10:19:33,894 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:19:33,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:19:33,927 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:19:33,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:19:33,961 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:19:33,961 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:19:33,961 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:19:33,961 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:19:33,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:19:33,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:19:33,962 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:19:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-21 10:19:33,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 10:19:33,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:33,993 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:33,993 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-09-21 10:19:34,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:34,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399394309] [2020-09-21 10:19:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:19:34,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399394309] [2020-09-21 10:19:34,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:19:34,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:19:34,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786043592] [2020-09-21 10:19:34,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:19:34,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:34,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:19:34,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:19:34,306 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-09-21 10:19:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:34,396 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-09-21 10:19:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:19:34,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 10:19:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:34,412 INFO L225 Difference]: With dead ends: 30 [2020-09-21 10:19:34,413 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 10:19:34,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:19:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 10:19:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-21 10:19:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 10:19:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-21 10:19:34,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-09-21 10:19:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:34,466 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-21 10:19:34,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:19:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-21 10:19:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-21 10:19:34,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:34,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:34,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:19:34,471 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-09-21 10:19:34,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:34,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782771624] [2020-09-21 10:19:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-21 10:19:34,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782771624] [2020-09-21 10:19:34,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:34,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 10:19:34,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727731997] [2020-09-21 10:19:34,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 10:19:34,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:34,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 10:19:34,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-21 10:19:34,624 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-09-21 10:19:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:34,698 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-09-21 10:19:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:19:34,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-21 10:19:34,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:34,701 INFO L225 Difference]: With dead ends: 25 [2020-09-21 10:19:34,701 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 10:19:34,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:19:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 10:19:34,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 10:19:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 10:19:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 10:19:34,710 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-09-21 10:19:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:34,711 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 10:19:34,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 10:19:34,711 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 10:19:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-21 10:19:34,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:34,713 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:34,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:19:34,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-09-21 10:19:34,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:34,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087560412] [2020-09-21 10:19:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-21 10:19:34,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087560412] [2020-09-21 10:19:34,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:34,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 10:19:34,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899847789] [2020-09-21 10:19:34,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 10:19:34,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:34,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 10:19:34,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-21 10:19:34,911 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-09-21 10:19:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:34,983 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-09-21 10:19:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 10:19:34,984 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-21 10:19:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:34,985 INFO L225 Difference]: With dead ends: 28 [2020-09-21 10:19:34,985 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 10:19:34,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:19:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 10:19:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 10:19:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:19:34,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-21 10:19:34,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-09-21 10:19:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:34,994 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-21 10:19:34,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 10:19:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-21 10:19:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-21 10:19:34,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:34,996 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:34,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:19:34,996 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:34,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:34,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-09-21 10:19:34,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:34,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704104955] [2020-09-21 10:19:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:35,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:35,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-21 10:19:35,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704104955] [2020-09-21 10:19:35,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:35,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:19:35,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897581628] [2020-09-21 10:19:35,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:19:35,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:19:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:19:35,189 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-09-21 10:19:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:35,295 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-21 10:19:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 10:19:35,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-09-21 10:19:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:35,297 INFO L225 Difference]: With dead ends: 31 [2020-09-21 10:19:35,297 INFO L226 Difference]: Without dead ends: 27 [2020-09-21 10:19:35,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:19:35,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-09-21 10:19:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-09-21 10:19:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 10:19:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 10:19:35,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-09-21 10:19:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:35,306 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 10:19:35,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:19:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 10:19:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-21 10:19:35,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:35,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:35,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:19:35,308 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:35,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-09-21 10:19:35,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:35,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110011547] [2020-09-21 10:19:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-21 10:19:35,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110011547] [2020-09-21 10:19:35,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:35,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 10:19:35,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971747638] [2020-09-21 10:19:35,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 10:19:35,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 10:19:35,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-21 10:19:35,549 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-09-21 10:19:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:35,633 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-21 10:19:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:19:35,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-09-21 10:19:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:35,636 INFO L225 Difference]: With dead ends: 34 [2020-09-21 10:19:35,636 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 10:19:35,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:19:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 10:19:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-21 10:19:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:19:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-21 10:19:35,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-09-21 10:19:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:35,644 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-21 10:19:35,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 10:19:35,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-21 10:19:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-21 10:19:35,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:35,646 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:35,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:19:35,646 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-09-21 10:19:35,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:35,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296441948] [2020-09-21 10:19:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-21 10:19:35,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296441948] [2020-09-21 10:19:35,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:35,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:19:35,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550623540] [2020-09-21 10:19:35,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:19:35,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:19:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:19:35,899 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-09-21 10:19:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:36,000 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-09-21 10:19:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:19:36,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-21 10:19:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:36,003 INFO L225 Difference]: With dead ends: 37 [2020-09-21 10:19:36,003 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 10:19:36,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-09-21 10:19:36,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 10:19:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-21 10:19:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 10:19:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-21 10:19:36,011 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-09-21 10:19:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:36,011 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-21 10:19:36,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:19:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-21 10:19:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-21 10:19:36,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:36,013 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:36,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:19:36,014 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-09-21 10:19:36,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:36,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527421960] [2020-09-21 10:19:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-09-21 10:19:36,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527421960] [2020-09-21 10:19:36,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:36,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 10:19:36,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86195023] [2020-09-21 10:19:36,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 10:19:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 10:19:36,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-21 10:19:36,254 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-09-21 10:19:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:36,381 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-09-21 10:19:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 10:19:36,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-21 10:19:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:36,383 INFO L225 Difference]: With dead ends: 40 [2020-09-21 10:19:36,383 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 10:19:36,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-21 10:19:36,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 10:19:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-21 10:19:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:19:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-21 10:19:36,390 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-09-21 10:19:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:36,391 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-21 10:19:36,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 10:19:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-21 10:19:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-21 10:19:36,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:36,393 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:36,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:19:36,393 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-09-21 10:19:36,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:36,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253643175] [2020-09-21 10:19:36,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-21 10:19:36,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253643175] [2020-09-21 10:19:36,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:36,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 10:19:36,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231019190] [2020-09-21 10:19:36,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 10:19:36,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:36,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 10:19:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-09-21 10:19:36,641 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-09-21 10:19:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:36,759 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-09-21 10:19:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:19:36,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-09-21 10:19:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:36,761 INFO L225 Difference]: With dead ends: 43 [2020-09-21 10:19:36,761 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 10:19:36,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-09-21 10:19:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 10:19:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-21 10:19:36,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 10:19:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-21 10:19:36,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-09-21 10:19:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:36,769 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-21 10:19:36,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 10:19:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-21 10:19:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-21 10:19:36,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:36,771 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:36,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:19:36,772 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-09-21 10:19:36,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:36,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389355869] [2020-09-21 10:19:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-09-21 10:19:37,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389355869] [2020-09-21 10:19:37,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:37,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 10:19:37,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063866472] [2020-09-21 10:19:37,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 10:19:37,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:37,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 10:19:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-21 10:19:37,088 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-09-21 10:19:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:37,217 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-21 10:19:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 10:19:37,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-21 10:19:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:37,219 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:19:37,219 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 10:19:37,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:19:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 10:19:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-21 10:19:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 10:19:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-21 10:19:37,226 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-09-21 10:19:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:37,227 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-21 10:19:37,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 10:19:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-21 10:19:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-21 10:19:37,228 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:37,228 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:37,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 10:19:37,229 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-09-21 10:19:37,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:37,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794923662] [2020-09-21 10:19:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:19:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-21 10:19:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-21 10:19:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:19:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-09-21 10:19:37,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794923662] [2020-09-21 10:19:37,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:19:37,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:19:37,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517703746] [2020-09-21 10:19:37,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:19:37,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:19:37,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:19:37,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:19:37,559 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-09-21 10:19:37,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:19:37,735 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-21 10:19:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 10:19:37,735 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-09-21 10:19:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:19:37,737 INFO L225 Difference]: With dead ends: 49 [2020-09-21 10:19:37,737 INFO L226 Difference]: Without dead ends: 45 [2020-09-21 10:19:37,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-09-21 10:19:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-21 10:19:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-21 10:19:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 10:19:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-21 10:19:37,744 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-09-21 10:19:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:19:37,744 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-21 10:19:37,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:19:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-21 10:19:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-21 10:19:37,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:19:37,746 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:19:37,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 10:19:37,746 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:19:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:19:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-09-21 10:19:37,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:19:37,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594000093] [2020-09-21 10:19:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:19:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:19:37,768 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:19:37,768 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:19:37,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 10:19:37,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:19:37 BoogieIcfgContainer [2020-09-21 10:19:37,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:19:37,806 INFO L168 Benchmark]: Toolchain (without parser) took 4634.95 ms. Allocated memory was 138.9 MB in the beginning and 249.6 MB in the end (delta: 110.6 MB). Free memory was 102.1 MB in the beginning and 101.2 MB in the end (delta: 859.7 kB). Peak memory consumption was 111.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:37,807 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-09-21 10:19:37,808 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.96 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:37,809 INFO L168 Benchmark]: Boogie Preprocessor took 32.09 ms. Allocated memory is still 138.9 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:37,810 INFO L168 Benchmark]: RCFGBuilder took 344.36 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 169.6 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:37,811 INFO L168 Benchmark]: TraceAbstraction took 3926.70 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 169.6 MB in the beginning and 101.2 MB in the end (delta: 68.3 MB). Peak memory consumption was 116.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:19:37,815 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.0 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.96 ms. Allocated memory is still 138.9 MB. Free memory was 101.7 MB in the beginning and 92.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.09 ms. Allocated memory is still 138.9 MB. Free memory was 92.5 MB in the beginning and 91.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.36 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 169.6 MB in the end (delta: -78.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3926.70 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 169.6 MB in the beginning and 101.2 MB in the end (delta: 68.3 MB). Peak memory consumption was 116.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 163 SDslu, 424 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 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 incorrect! Received shutdown request...