/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:12:20,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:12:20,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:12:20,679 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:12:20,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:12:20,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:12:20,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:12:20,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:12:20,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:12:20,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:12:20,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:12:20,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:12:20,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:12:20,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:12:20,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:12:20,706 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:12:20,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:12:20,708 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:12:20,710 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:12:20,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:12:20,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:12:20,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:12:20,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:12:20,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:12:20,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:12:20,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:12:20,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:12:20,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:12:20,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:12:20,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:12:20,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:12:20,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:12:20,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:12:20,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:12:20,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:12:20,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:12:20,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:12:20,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:12:20,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:12:20,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:12:20,729 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:12:20,731 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:12:20,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:12:20,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:12:20,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:12:20,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:12:20,751 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:12:20,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:12:20,752 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:12:20,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:12:20,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:12:20,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:12:20,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:12:20,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:12:20,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:12:20,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:12:20,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:12:20,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:12:20,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:12:20,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:12:20,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:12:20,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:12:20,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:12:20,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:20,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:12:20,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:12:20,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:12:20,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:12:20,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:12:20,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:12:20,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:12:20,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:12:21,110 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:12:21,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:12:21,131 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:12:21,133 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:12:21,134 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:12:21,135 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-07-07 11:12:21,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f757f74/a1249c17a01042a880af2d645b1925ad/FLAG2cfae85b7 [2020-07-07 11:12:21,804 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:12:21,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-07-07 11:12:21,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f757f74/a1249c17a01042a880af2d645b1925ad/FLAG2cfae85b7 [2020-07-07 11:12:22,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f757f74/a1249c17a01042a880af2d645b1925ad [2020-07-07 11:12:22,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:12:22,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:12:22,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:22,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:12:22,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:12:22,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb4df6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22, skipping insertion in model container [2020-07-07 11:12:22,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:12:22,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:12:22,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:22,396 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:12:22,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:22,432 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:12:22,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22 WrapperNode [2020-07-07 11:12:22,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:22,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:12:22,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:12:22,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:12:22,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (1/1) ... [2020-07-07 11:12:22,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:12:22,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:12:22,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:12:22,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:12:22,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (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 [2020-07-07 11:12:22,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:12:22,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:12:22,709 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 11:12:22,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:12:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:12:22,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:12:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 11:12:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:12:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:12:22,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:12:22,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:12:22,931 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:12:22,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:22 BoogieIcfgContainer [2020-07-07 11:12:22,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:12:22,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:12:22,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:12:22,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:12:22,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:12:22" (1/3) ... [2020-07-07 11:12:22,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d4aee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:22, skipping insertion in model container [2020-07-07 11:12:22,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:22" (2/3) ... [2020-07-07 11:12:22,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d4aee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:22, skipping insertion in model container [2020-07-07 11:12:22,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:22" (3/3) ... [2020-07-07 11:12:22,952 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-07-07 11:12:22,967 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:12:22,983 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:12:23,043 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:12:23,121 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:12:23,122 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:12:23,123 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:12:23,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:12:23,124 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:12:23,124 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:12:23,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:12:23,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:12:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-07 11:12:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:12:23,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:23,173 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:23,174 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:23,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-07-07 11:12:23,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:23,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873374284] [2020-07-07 11:12:23,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:12:23,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873374284] [2020-07-07 11:12:23,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:23,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:23,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293729982] [2020-07-07 11:12:23,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:23,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:23,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:23,440 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-07 11:12:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:23,505 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-07 11:12:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:23,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:12:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:23,520 INFO L225 Difference]: With dead ends: 33 [2020-07-07 11:12:23,520 INFO L226 Difference]: Without dead ends: 19 [2020-07-07 11:12:23,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-07 11:12:23,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-07 11:12:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-07 11:12:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-07 11:12:23,575 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-07-07 11:12:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:23,576 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-07 11:12:23,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-07 11:12:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:12:23,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:23,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:23,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:12:23,580 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:23,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:23,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-07-07 11:12:23,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:23,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042584144] [2020-07-07 11:12:23,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:23,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042584144] [2020-07-07 11:12:23,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:23,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:12:23,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729144631] [2020-07-07 11:12:23,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:12:23,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:23,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:12:23,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:12:23,792 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-07-07 11:12:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:23,827 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-07 11:12:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:23,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-07 11:12:23,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:23,829 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:12:23,829 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:12:23,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:12:23,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:12:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-07 11:12:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:12:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-07 11:12:23,840 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-07 11:12:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:23,840 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-07 11:12:23,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:12:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-07 11:12:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:12:23,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:23,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:23,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:12:23,843 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:23,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-07-07 11:12:23,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:23,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917518227] [2020-07-07 11:12:23,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:24,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917518227] [2020-07-07 11:12:24,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857997431] [2020-07-07 11:12:24,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:12:24,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:24,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:24,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-07 11:12:24,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823762991] [2020-07-07 11:12:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:12:24,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:12:24,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:24,195 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-07-07 11:12:24,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:24,291 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-07 11:12:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:12:24,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-07 11:12:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:24,295 INFO L225 Difference]: With dead ends: 27 [2020-07-07 11:12:24,295 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:12:24,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:12:24,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:12:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:12:24,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-07 11:12:24,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-07-07 11:12:24,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:24,317 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-07 11:12:24,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:12:24,318 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-07 11:12:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:12:24,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:24,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:24,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:12:24,537 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2020-07-07 11:12:24,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:24,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775556904] [2020-07-07 11:12:24,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:24,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775556904] [2020-07-07 11:12:24,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318960113] [2020-07-07 11:12:24,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:24,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:12:24,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:24,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:24,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-07 11:12:24,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390846493] [2020-07-07 11:12:24,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:12:24,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:12:24,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:24,853 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-07-07 11:12:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:24,898 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-07 11:12:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:12:24,899 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-07 11:12:24,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:24,901 INFO L225 Difference]: With dead ends: 35 [2020-07-07 11:12:24,901 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:12:24,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:12:24,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-07 11:12:24,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 11:12:24,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-07 11:12:24,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2020-07-07 11:12:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:24,910 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-07 11:12:24,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:12:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-07 11:12:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:12:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:24,912 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:25,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:25,127 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:25,128 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-07-07 11:12:25,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:25,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8312276] [2020-07-07 11:12:25,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:25,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8312276] [2020-07-07 11:12:25,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128444154] [2020-07-07 11:12:25,408 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:25,450 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:25,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:25,452 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:12:25,454 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:25,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:25,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-07 11:12:25,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121106226] [2020-07-07 11:12:25,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:12:25,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:25,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:12:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:12:25,500 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 13 states. [2020-07-07 11:12:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:25,571 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-07-07 11:12:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:12:25,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-07-07 11:12:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:25,573 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:12:25,573 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:12:25,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:12:25,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:12:25,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:12:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:12:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-07 11:12:25,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2020-07-07 11:12:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:25,582 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-07 11:12:25,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:12:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-07 11:12:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 11:12:25,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:25,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:25,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:25,801 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:25,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash -645661089, now seen corresponding path program 2 times [2020-07-07 11:12:25,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:25,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636757917] [2020-07-07 11:12:25,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-07-07 11:12:25,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636757917] [2020-07-07 11:12:25,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:25,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:25,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115283123] [2020-07-07 11:12:25,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:25,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:25,942 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 5 states. [2020-07-07 11:12:25,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:25,955 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-07 11:12:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:25,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-07-07 11:12:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:25,956 INFO L225 Difference]: With dead ends: 27 [2020-07-07 11:12:25,956 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:12:25,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:12:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:12:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:12:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:12:25,960 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-07 11:12:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:25,961 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:12:25,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:12:25,962 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:12:25,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 11:12:25,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:12:26,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:12:26,002 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:12:26,002 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:12:26,002 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:12:26,002 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:12:26,002 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:12:26,003 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-07-07 11:12:26,003 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-07 11:12:26,003 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-07-07 11:12:26,003 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-07 11:12:26,003 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-07-07 11:12:26,004 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-07-07 11:12:26,004 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-07 11:12:26,004 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-07-07 11:12:26,004 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-07-07 11:12:26,004 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-07-07 11:12:26,005 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-07-07 11:12:26,005 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-07 11:12:26,005 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-07-07 11:12:26,005 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-07 11:12:26,005 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-07 11:12:26,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:12:26 BoogieIcfgContainer [2020-07-07 11:12:26,023 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:12:26,028 INFO L168 Benchmark]: Toolchain (without parser) took 3898.10 ms. Allocated memory was 136.8 MB in the beginning and 228.1 MB in the end (delta: 91.2 MB). Free memory was 99.5 MB in the beginning and 128.7 MB in the end (delta: -29.1 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:26,034 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 136.8 MB. Free memory is still 118.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:12:26,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.76 ms. Allocated memory is still 136.8 MB. Free memory was 99.5 MB in the beginning and 90.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:26,037 INFO L168 Benchmark]: Boogie Preprocessor took 185.55 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.5 MB in the beginning and 179.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:26,038 INFO L168 Benchmark]: RCFGBuilder took 317.43 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 167.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:26,039 INFO L168 Benchmark]: TraceAbstraction took 3083.18 ms. Allocated memory was 200.8 MB in the beginning and 228.1 MB in the end (delta: 27.3 MB). Free memory was 167.7 MB in the beginning and 128.7 MB in the end (delta: 39.0 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:26,051 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 136.8 MB. Free memory is still 118.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.76 ms. Allocated memory is still 136.8 MB. Free memory was 99.5 MB in the beginning and 90.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 185.55 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.5 MB in the beginning and 179.3 MB in the end (delta: -88.8 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 317.43 ms. Allocated memory is still 200.8 MB. Free memory was 179.3 MB in the beginning and 167.7 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3083.18 ms. Allocated memory was 200.8 MB in the beginning and 228.1 MB in the end (delta: 27.3 MB). Free memory was 167.7 MB in the beginning and 128.7 MB in the end (delta: 39.0 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 18 SDslu, 474 SDs, 0 SdLazy, 107 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, 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, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 206 ConstructedInterpolants, 0 QuantifiedInterpolants, 9016 SizeOfPredicates, 7 NumberOfNonLiveVariables, 187 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 77/105 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...