/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:10:13,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:10:13,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:10:13,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:10:13,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:10:13,557 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:10:13,558 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:10:13,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:10:13,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:10:13,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:10:13,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:10:13,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:10:13,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:10:13,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:10:13,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:10:13,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:10:13,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:10:13,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:10:13,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:10:13,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:10:13,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:10:13,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:10:13,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:10:13,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:10:13,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 22:10:13,591 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 22:10:13,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 22:10:13,593 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 22:10:13,594 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 22:10:13,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 22:10:13,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 22:10:13,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 22:10:13,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 22:10:13,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 22:10:13,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 22:10:13,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 22:10:13,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 22:10:13,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 22:10:13,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:10:13,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:10:13,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:10:13,606 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 22:10:13,626 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:10:13,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:10:13,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:10:13,628 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:10:13,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:10:13,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:10:13,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:10:13,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:10:13,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:10:13,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:10:13,631 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:10:13,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:10:13,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:10:13,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:10:13,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:10:13,632 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:10:13,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:10:13,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:10:13,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:10:13,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:10:13,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:10:13,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:10:13,633 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-08-22 22:10:13,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:10:13,981 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:10:13,985 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:10:13,987 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:10:13,988 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:10:13,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-22 22:10:14,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e5c281d/0cd31adc4ef64789a6dc997cc8d18750/FLAGc61640d20 [2020-08-22 22:10:14,500 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:10:14,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-22 22:10:14,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e5c281d/0cd31adc4ef64789a6dc997cc8d18750/FLAGc61640d20 [2020-08-22 22:10:14,867 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7e5c281d/0cd31adc4ef64789a6dc997cc8d18750 [2020-08-22 22:10:14,878 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:10:14,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:10:14,882 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:14,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:10:14,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:10:14,887 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:14" (1/1) ... [2020-08-22 22:10:14,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3284ff28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:14, skipping insertion in model container [2020-08-22 22:10:14,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:10:14" (1/1) ... [2020-08-22 22:10:14,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:10:14,916 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:10:15,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:15,097 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:10:15,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:10:15,129 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:10:15,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15 WrapperNode [2020-08-22 22:10:15,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:10:15,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:10:15,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:10:15,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:10:15,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (1/1) ... [2020-08-22 22:10:15,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:10:15,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:10:15,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:10:15,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:10:15,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (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 22:10:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:10:15,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:10:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 22:10:15,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:10:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:10:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:10:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 22:10:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:10:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:10:15,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:10:15,499 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:10:15,499 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 22:10:15,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:15 BoogieIcfgContainer [2020-08-22 22:10:15,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:10:15,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:10:15,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:10:15,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:10:15,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:10:14" (1/3) ... [2020-08-22 22:10:15,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1733cfbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:15, skipping insertion in model container [2020-08-22 22:10:15,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:10:15" (2/3) ... [2020-08-22 22:10:15,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1733cfbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:10:15, skipping insertion in model container [2020-08-22 22:10:15,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:10:15" (3/3) ... [2020-08-22 22:10:15,513 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-22 22:10:15,526 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:10:15,535 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:10:15,552 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:10:15,580 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:10:15,581 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:10:15,581 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:10:15,581 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:10:15,581 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:10:15,581 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:10:15,581 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:10:15,582 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:10:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-22 22:10:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 22:10:15,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:15,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:15,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-08-22 22:10:15,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:15,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020365842] [2020-08-22 22:10:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:15,907 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 22:10:15,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020365842] [2020-08-22 22:10:15,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:10:15,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:10:15,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804888400] [2020-08-22 22:10:15,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:10:15,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:15,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:10:15,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:10:15,939 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-08-22 22:10:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:16,047 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-08-22 22:10:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:10:16,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 22:10:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:16,060 INFO L225 Difference]: With dead ends: 37 [2020-08-22 22:10:16,061 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 22:10:16,065 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 [2020-08-22 22:10:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 22:10:16,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-08-22 22:10:16,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-22 22:10:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-22 22:10:16,120 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-08-22 22:10:16,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:16,121 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-22 22:10:16,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:10:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-22 22:10:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 22:10:16,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:16,124 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] [2020-08-22 22:10:16,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:10:16,125 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:16,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-08-22 22:10:16,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:16,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245238997] [2020-08-22 22:10:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 22:10:16,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245238997] [2020-08-22 22:10:16,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:16,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 22:10:16,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123462612] [2020-08-22 22:10:16,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 22:10:16,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 22:10:16,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 22:10:16,255 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-08-22 22:10:16,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:16,353 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 22:10:16,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:10:16,355 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-22 22:10:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:16,356 INFO L225 Difference]: With dead ends: 34 [2020-08-22 22:10:16,357 INFO L226 Difference]: Without dead ends: 28 [2020-08-22 22:10:16,360 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 [2020-08-22 22:10:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-22 22:10:16,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-22 22:10:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 22:10:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-08-22 22:10:16,385 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-08-22 22:10:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:16,386 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-08-22 22:10:16,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 22:10:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-08-22 22:10:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 22:10:16,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:16,389 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:16,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:10:16,389 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-08-22 22:10:16,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:16,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715459447] [2020-08-22 22:10:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 22:10:16,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715459447] [2020-08-22 22:10:16,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:16,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 22:10:16,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752219889] [2020-08-22 22:10:16,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 22:10:16,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 22:10:16,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:10:16,557 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-08-22 22:10:16,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:16,630 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-08-22 22:10:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 22:10:16,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-08-22 22:10:16,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:16,633 INFO L225 Difference]: With dead ends: 39 [2020-08-22 22:10:16,633 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 22:10:16,634 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 [2020-08-22 22:10:16,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 22:10:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 22:10:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 22:10:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 22:10:16,645 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-08-22 22:10:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:16,646 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 22:10:16,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 22:10:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 22:10:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 22:10:16,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:16,648 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:16,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:10:16,649 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-08-22 22:10:16,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:16,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525253737] [2020-08-22 22:10:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 22:10:16,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525253737] [2020-08-22 22:10:16,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:16,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 22:10:16,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825781067] [2020-08-22 22:10:16,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 22:10:16,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 22:10:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 22:10:16,855 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-08-22 22:10:16,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:16,965 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-08-22 22:10:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 22:10:16,966 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-22 22:10:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:16,968 INFO L225 Difference]: With dead ends: 44 [2020-08-22 22:10:16,968 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 22:10:16,969 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 [2020-08-22 22:10:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 22:10:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-08-22 22:10:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-22 22:10:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-08-22 22:10:16,981 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-08-22 22:10:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:16,982 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-08-22 22:10:16,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 22:10:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-08-22 22:10:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 22:10:16,984 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:16,984 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:16,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:10:16,985 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:16,985 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-08-22 22:10:16,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:16,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636547635] [2020-08-22 22:10:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 22:10:17,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636547635] [2020-08-22 22:10:17,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:17,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 22:10:17,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173310000] [2020-08-22 22:10:17,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 22:10:17,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:17,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 22:10:17,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 22:10:17,282 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-08-22 22:10:17,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:17,368 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 22:10:17,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 22:10:17,369 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-08-22 22:10:17,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:17,371 INFO L225 Difference]: With dead ends: 49 [2020-08-22 22:10:17,371 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 22:10:17,372 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 [2020-08-22 22:10:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 22:10:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-22 22:10:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 22:10:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-08-22 22:10:17,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-08-22 22:10:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:17,383 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-08-22 22:10:17,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 22:10:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-08-22 22:10:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 22:10:17,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:17,386 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:17,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 22:10:17,387 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:17,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:17,387 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-08-22 22:10:17,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:17,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96631973] [2020-08-22 22:10:17,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:17,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 22:10:17,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96631973] [2020-08-22 22:10:17,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:17,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 22:10:17,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025972387] [2020-08-22 22:10:17,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 22:10:17,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:17,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 22:10:17,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 22:10:17,630 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2020-08-22 22:10:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:17,770 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-08-22 22:10:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 22:10:17,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-08-22 22:10:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:17,773 INFO L225 Difference]: With dead ends: 54 [2020-08-22 22:10:17,773 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 22:10:17,774 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 [2020-08-22 22:10:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 22:10:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 22:10:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 22:10:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 22:10:17,786 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 56 [2020-08-22 22:10:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:17,787 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 22:10:17,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 22:10:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 22:10:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 22:10:17,789 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:17,790 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:17,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 22:10:17,790 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:17,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1000802417, now seen corresponding path program 6 times [2020-08-22 22:10:17,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:17,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029663796] [2020-08-22 22:10:17,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:17,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 22:10:18,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029663796] [2020-08-22 22:10:18,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:18,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 22:10:18,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392779167] [2020-08-22 22:10:18,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 22:10:18,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 22:10:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 22:10:18,050 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2020-08-22 22:10:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:18,179 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-08-22 22:10:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 22:10:18,179 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-08-22 22:10:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:18,181 INFO L225 Difference]: With dead ends: 59 [2020-08-22 22:10:18,181 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 22:10:18,182 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 [2020-08-22 22:10:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 22:10:18,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-08-22 22:10:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 22:10:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-08-22 22:10:18,193 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 64 [2020-08-22 22:10:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:18,194 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-08-22 22:10:18,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 22:10:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-08-22 22:10:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 22:10:18,195 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:18,195 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:18,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 22:10:18,196 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:18,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:18,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1977618599, now seen corresponding path program 7 times [2020-08-22 22:10:18,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:18,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587040770] [2020-08-22 22:10:18,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 22:10:18,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587040770] [2020-08-22 22:10:18,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:18,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 22:10:18,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372990557] [2020-08-22 22:10:18,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 22:10:18,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:18,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 22:10:18,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 22:10:18,454 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2020-08-22 22:10:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:18,592 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 22:10:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 22:10:18,593 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-08-22 22:10:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:18,595 INFO L225 Difference]: With dead ends: 64 [2020-08-22 22:10:18,595 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 22:10:18,596 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 [2020-08-22 22:10:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 22:10:18,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-08-22 22:10:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 22:10:18,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-08-22 22:10:18,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 72 [2020-08-22 22:10:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:18,607 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-08-22 22:10:18,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 22:10:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-08-22 22:10:18,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 22:10:18,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:18,609 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:18,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 22:10:18,610 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash 555623729, now seen corresponding path program 8 times [2020-08-22 22:10:18,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:18,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11498391] [2020-08-22 22:10:18,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 22:10:18,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11498391] [2020-08-22 22:10:18,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:18,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 22:10:18,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352139280] [2020-08-22 22:10:18,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 22:10:18,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 22:10:18,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 22:10:18,952 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2020-08-22 22:10:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:19,143 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-08-22 22:10:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 22:10:19,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-08-22 22:10:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:19,149 INFO L225 Difference]: With dead ends: 69 [2020-08-22 22:10:19,149 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 22:10:19,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-22 22:10:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 22:10:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 22:10:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 22:10:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 22:10:19,172 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2020-08-22 22:10:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:19,176 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 22:10:19,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 22:10:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 22:10:19,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 22:10:19,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:19,179 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:19,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 22:10:19,179 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:19,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash 777699815, now seen corresponding path program 9 times [2020-08-22 22:10:19,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:19,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528317047] [2020-08-22 22:10:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:10:19,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 22:10:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 22:10:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:10:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 22:10:19,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528317047] [2020-08-22 22:10:19,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:10:19,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:10:19,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954847474] [2020-08-22 22:10:19,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:10:19,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:10:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:10:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:10:19,614 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2020-08-22 22:10:19,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:10:19,785 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-08-22 22:10:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 22:10:19,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-08-22 22:10:19,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:10:19,788 INFO L225 Difference]: With dead ends: 74 [2020-08-22 22:10:19,790 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 22:10:19,792 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 [2020-08-22 22:10:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 22:10:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-08-22 22:10:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 22:10:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-08-22 22:10:19,805 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 88 [2020-08-22 22:10:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:10:19,806 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-08-22 22:10:19,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:10:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-08-22 22:10:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 22:10:19,813 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:10:19,813 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:10:19,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 22:10:19,814 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:10:19,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:10:19,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2145915377, now seen corresponding path program 10 times [2020-08-22 22:10:19,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:10:19,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783683107] [2020-08-22 22:10:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:10:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:10:19,854 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:10:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:10:19,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:10:19,909 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:10:19,909 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:10:19,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 22:10:20,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:10:20 BoogieIcfgContainer [2020-08-22 22:10:20,002 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:10:20,006 INFO L168 Benchmark]: Toolchain (without parser) took 5124.42 ms. Allocated memory was 138.9 MB in the beginning and 292.0 MB in the end (delta: 153.1 MB). Free memory was 102.2 MB in the beginning and 181.5 MB in the end (delta: -79.3 MB). Peak memory consumption was 73.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:20,007 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 119.9 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:10:20,008 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.14 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:20,013 INFO L168 Benchmark]: Boogie Preprocessor took 28.74 ms. Allocated memory is still 138.9 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:20,014 INFO L168 Benchmark]: RCFGBuilder took 344.74 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.4 MB in the beginning and 168.4 MB in the end (delta: -77.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:20,014 INFO L168 Benchmark]: TraceAbstraction took 4496.82 ms. Allocated memory was 200.8 MB in the beginning and 292.0 MB in the end (delta: 91.2 MB). Free memory was 167.7 MB in the beginning and 181.5 MB in the end (delta: -13.8 MB). Peak memory consumption was 77.4 MB. Max. memory is 7.1 GB. [2020-08-22 22:10:20,029 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 119.9 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.14 ms. Allocated memory is still 138.9 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.74 ms. Allocated memory is still 138.9 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.74 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 91.4 MB in the beginning and 168.4 MB in the end (delta: -77.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4496.82 ms. Allocated memory was 200.8 MB in the beginning and 292.0 MB in the end (delta: 91.2 MB). Free memory was 167.7 MB in the beginning and 181.5 MB in the end (delta: -13.8 MB). Peak memory consumption was 77.4 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; VAL [input=10] [L11] CALL, EXPR id(input) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 VAL [\old(x)=0, x=0] [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; VAL [\old(x)=1, \result=1, id(x-1)=0, x=1] [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; VAL [\old(x)=2, \result=2, id(x-1)=1, x=2] [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; VAL [\old(x)=3, \result=3, id(x-1)=2, x=3] [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; VAL [\old(x)=4, \result=4, id(x-1)=3, x=4] [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; VAL [\old(x)=5, \result=5, id(x-1)=4, x=5] [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; VAL [\old(x)=6, \result=6, id(x-1)=5, x=6] [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; VAL [\old(x)=7, \result=7, id(x-1)=6, x=7] [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; VAL [\old(x)=8, \result=8, id(x-1)=7, x=8] [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; VAL [\old(x)=9, \result=9, id(x-1)=8, x=9] [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; VAL [\old(x)=10, \result=10, id(x-1)=9, x=10] [L11] RET, EXPR id(input) VAL [id(input)=10, input=10] [L11] int result = id(input); VAL [id(input)=10, input=10, result=10] [L12] COND TRUE result == 10 VAL [input=10, result=10] [L13] __VERIFIER_error() VAL [input=10, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 184 SDtfs, 320 SDslu, 660 SDs, 0 SdLazy, 275 SolverSat, 17 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=68occurred 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: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 616 NumberOfCodeBlocks, 616 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 510 ConstructedInterpolants, 0 QuantifiedInterpolants, 77760 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/1140 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...