/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/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:21:10,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:21:10,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:21:10,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:21:10,200 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:21:10,201 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:21:10,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:21:10,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:21:10,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:21:10,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:21:10,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:21:10,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:21:10,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:21:10,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:21:10,211 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:21:10,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:21:10,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:21:10,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:21:10,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:21:10,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:21:10,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:21:10,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:21:10,225 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:21:10,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:21:10,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 13:21:10,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 13:21:10,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 13:21:10,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 13:21:10,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 13:21:10,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 13:21:10,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:21:10,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:21:10,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:21:10,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:21:10,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:21:10,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:21:10,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:21:10,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:21:10,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:21:10,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:21:10,248 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:21:10,249 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:21:10,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:21:10,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:21:10,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:21:10,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:21:10,309 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:21:10,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:21:10,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:21:10,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:21:10,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:21:10,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:21:10,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:21:10,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:21:10,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:21:10,314 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:21:10,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:21:10,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:21:10,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:21:10,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:21:10,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:21:10,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:21:10,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:21:10,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:21:10,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:21:10,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:21:10,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:21:10,318 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:21:10,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:21:10,318 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:21:10,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:21:10,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:21:10,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:21:10,802 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:21:10,806 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:21:10,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:21:10,809 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:21:10,810 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-09-04 13:21:10,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67f3e0553/fe025511152048d6be508880af543176/FLAGe0af7a492 [2020-09-04 13:21:11,490 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:21:11,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-09-04 13:21:11,499 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67f3e0553/fe025511152048d6be508880af543176/FLAGe0af7a492 [2020-09-04 13:21:11,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67f3e0553/fe025511152048d6be508880af543176 [2020-09-04 13:21:11,806 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:21:11,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:21:11,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:11,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:21:11,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:21:11,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:11" (1/1) ... [2020-09-04 13:21:11,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e622eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:11, skipping insertion in model container [2020-09-04 13:21:11,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:21:11" (1/1) ... [2020-09-04 13:21:11,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:21:11,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:21:12,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:12,072 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:21:12,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:21:12,111 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:21:12,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12 WrapperNode [2020-09-04 13:21:12,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:21:12,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:21:12,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:21:12,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:21:12,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... [2020-09-04 13:21:12,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:21:12,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:21:12,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:21:12,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:21:12,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:21:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:21:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:21:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 13:21:12,332 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-04 13:21:12,332 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:21:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:21:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:21:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 13:21:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-04 13:21:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:21:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:21:12,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:21:12,551 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:21:12,552 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:21:12,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:12 BoogieIcfgContainer [2020-09-04 13:21:12,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:21:12,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:21:12,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:21:12,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:21:12,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:21:11" (1/3) ... [2020-09-04 13:21:12,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e822834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:12, skipping insertion in model container [2020-09-04 13:21:12,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:21:12" (2/3) ... [2020-09-04 13:21:12,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e822834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:21:12, skipping insertion in model container [2020-09-04 13:21:12,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:21:12" (3/3) ... [2020-09-04 13:21:12,567 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-09-04 13:21:12,578 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:21:12,587 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:21:12,608 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:21:12,639 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:21:12,639 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:21:12,639 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:21:12,640 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:21:12,640 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:21:12,640 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:21:12,640 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:21:12,640 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:21:12,660 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-09-04 13:21:12,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:21:12,668 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:12,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:12,670 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:12,677 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-09-04 13:21:12,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:12,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172317757] [2020-09-04 13:21:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:12,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:12,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:21:12,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172317757] [2020-09-04 13:21:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:12,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:21:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437718416] [2020-09-04 13:21:12,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:21:12,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:12,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:21:12,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:21:12,953 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-09-04 13:21:13,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:13,205 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-09-04 13:21:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:21:13,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:21:13,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:13,225 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:21:13,226 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 13:21:13,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:21:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 13:21:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 13:21:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 13:21:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-09-04 13:21:13,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-09-04 13:21:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:13,300 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-09-04 13:21:13,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:21:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-09-04 13:21:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-04 13:21:13,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:13,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:13,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:21:13,303 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-09-04 13:21:13,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:13,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048521319] [2020-09-04 13:21:13,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:21:13,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048521319] [2020-09-04 13:21:13,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:21:13,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:21:13,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259704515] [2020-09-04 13:21:13,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:21:13,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:13,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:21:13,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:21:13,470 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-09-04 13:21:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:13,565 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-09-04 13:21:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:21:13,566 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-04 13:21:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:13,568 INFO L225 Difference]: With dead ends: 33 [2020-09-04 13:21:13,568 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 13:21:13,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 13:21:13,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 13:21:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-04 13:21:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 13:21:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-04 13:21:13,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-09-04 13:21:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:13,579 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-04 13:21:13,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:21:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-04 13:21:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 13:21:13,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:13,581 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:13,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:21:13,581 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-09-04 13:21:13,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:13,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386998597] [2020-09-04 13:21:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:13,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386998597] [2020-09-04 13:21:13,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242898365] [2020-09-04 13:21:13,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:13,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-04 13:21:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 13:21:13,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:13,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-09-04 13:21:13,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6581232] [2020-09-04 13:21:13,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 13:21:13,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 13:21:13,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-04 13:21:13,993 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-09-04 13:21:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:14,148 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-09-04 13:21:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 13:21:14,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-09-04 13:21:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:14,151 INFO L225 Difference]: With dead ends: 39 [2020-09-04 13:21:14,151 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 13:21:14,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-09-04 13:21:14,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 13:21:14,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-09-04 13:21:14,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:21:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-04 13:21:14,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-09-04 13:21:14,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:14,160 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-04 13:21:14,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 13:21:14,160 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-04 13:21:14,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:21:14,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:14,162 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:14,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:21:14,376 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:14,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-09-04 13:21:14,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:14,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415167045] [2020-09-04 13:21:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:21:14,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415167045] [2020-09-04 13:21:14,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007455802] [2020-09-04 13:21:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:14,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:21:14,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 13:21:14,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:14,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-09-04 13:21:14,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391348239] [2020-09-04 13:21:14,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:21:14,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:21:14,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-04 13:21:14,702 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-09-04 13:21:14,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:14,814 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-09-04 13:21:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 13:21:14,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-09-04 13:21:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:14,817 INFO L225 Difference]: With dead ends: 45 [2020-09-04 13:21:14,817 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 13:21:14,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:21:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 13:21:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-09-04 13:21:14,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:21:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-09-04 13:21:14,826 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-09-04 13:21:14,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:14,827 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-09-04 13:21:14,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:21:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-09-04 13:21:14,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 13:21:14,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:14,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:15,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:15,044 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:15,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:15,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-09-04 13:21:15,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:15,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620095413] [2020-09-04 13:21:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-04 13:21:15,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620095413] [2020-09-04 13:21:15,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637554840] [2020-09-04 13:21:15,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:21:15,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:15,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:15,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-04 13:21:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-04 13:21:15,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:15,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2020-09-04 13:21:15,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621393785] [2020-09-04 13:21:15,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:21:15,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:21:15,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-04 13:21:15,454 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 13 states. [2020-09-04 13:21:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:15,641 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-09-04 13:21:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:21:15,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-09-04 13:21:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:15,649 INFO L225 Difference]: With dead ends: 51 [2020-09-04 13:21:15,649 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 13:21:15,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:21:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 13:21:15,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-09-04 13:21:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:21:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-04 13:21:15,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-09-04 13:21:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:15,666 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-04 13:21:15,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:21:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-04 13:21:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 13:21:15,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:15,671 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:15,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:15,873 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-09-04 13:21:15,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:15,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590085837] [2020-09-04 13:21:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:15,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:15,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:21:16,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590085837] [2020-09-04 13:21:16,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202742300] [2020-09-04 13:21:16,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:16,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-04 13:21:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-04 13:21:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-04 13:21:16,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:21:16,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-04 13:21:16,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574015192] [2020-09-04 13:21:16,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 13:21:16,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 13:21:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:21:16,445 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-09-04 13:21:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:16,548 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-09-04 13:21:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 13:21:16,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-09-04 13:21:16,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:16,550 INFO L225 Difference]: With dead ends: 57 [2020-09-04 13:21:16,551 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 13:21:16,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:21:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 13:21:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-09-04 13:21:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:21:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-04 13:21:16,559 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-09-04 13:21:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:16,560 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-04 13:21:16,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 13:21:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-04 13:21:16,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 13:21:16,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:16,562 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:16,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:16,777 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash 706413819, now seen corresponding path program 3 times [2020-09-04 13:21:16,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:16,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132073788] [2020-09-04 13:21:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:16,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 13:21:17,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132073788] [2020-09-04 13:21:17,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707336428] [2020-09-04 13:21:17,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:17,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:21:17,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:17,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-04 13:21:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-04 13:21:17,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:21:17,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 16 [2020-09-04 13:21:17,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137580895] [2020-09-04 13:21:17,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 13:21:17,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:17,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 13:21:17,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-09-04 13:21:17,459 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-09-04 13:21:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:17,738 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-09-04 13:21:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 13:21:17,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-09-04 13:21:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:17,740 INFO L225 Difference]: With dead ends: 63 [2020-09-04 13:21:17,740 INFO L226 Difference]: Without dead ends: 39 [2020-09-04 13:21:17,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-04 13:21:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-04 13:21:17,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-09-04 13:21:17,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 13:21:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-04 13:21:17,749 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 49 [2020-09-04 13:21:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:17,750 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-04 13:21:17,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 13:21:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-04 13:21:17,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 13:21:17,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:21:17,752 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:21:17,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-09-04 13:21:17,956 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:21:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:21:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1492956279, now seen corresponding path program 3 times [2020-09-04 13:21:17,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:21:17,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724765014] [2020-09-04 13:21:17,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:21:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:21:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:17,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:21:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 13:21:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:21:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-04 13:21:18,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724765014] [2020-09-04 13:21:18,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860222055] [2020-09-04 13:21:18,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:18,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-04 13:21:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-04 13:21:18,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-04 13:21:18,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:21:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-09-04 13:21:18,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-04 13:21:18,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 17 [2020-09-04 13:21:18,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820613714] [2020-09-04 13:21:18,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 13:21:18,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:21:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 13:21:18,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2020-09-04 13:21:18,478 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-09-04 13:21:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:21:18,777 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-09-04 13:21:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 13:21:18,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-04 13:21:18,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:21:18,779 INFO L225 Difference]: With dead ends: 39 [2020-09-04 13:21:18,779 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 13:21:18,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-09-04 13:21:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 13:21:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 13:21:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 13:21:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 13:21:18,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2020-09-04 13:21:18,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:21:18,785 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 13:21:18,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 13:21:18,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 13:21:18,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 13:21:18,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:21:18,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 13:21:19,047 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 13:21:19,048 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:21:19,048 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-09-04 13:21:19,049 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-04 13:21:19,049 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-04 13:21:19,049 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2020-09-04 13:21:19,049 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2020-09-04 13:21:19,049 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2020-09-04 13:21:19,049 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-04 13:21:19,050 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 13:21:19,050 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 13:21:19,050 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-04 13:21:19,050 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-09-04 13:21:19,051 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 23) the Hoare annotation is: true [2020-09-04 13:21:19,051 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 23) no Hoare annotation was computed. [2020-09-04 13:21:19,051 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-09-04 13:21:19,051 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-09-04 13:21:19,051 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-09-04 13:21:19,051 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-09-04 13:21:19,052 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-09-04 13:21:19,052 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2020-09-04 13:21:19,052 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2020-09-04 13:21:19,052 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-09-04 13:21:19,052 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-04 13:21:19,052 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-09-04 13:21:19,053 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2020-09-04 13:21:19,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:21:19 BoogieIcfgContainer [2020-09-04 13:21:19,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:21:19,072 INFO L168 Benchmark]: Toolchain (without parser) took 7260.03 ms. Allocated memory was 146.8 MB in the beginning and 286.8 MB in the end (delta: 140.0 MB). Free memory was 103.2 MB in the beginning and 246.1 MB in the end (delta: -143.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:21:19,073 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:21:19,075 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.43 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:19,084 INFO L168 Benchmark]: Boogie Preprocessor took 130.83 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 93.1 MB in the beginning and 182.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:19,085 INFO L168 Benchmark]: RCFGBuilder took 313.16 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:19,086 INFO L168 Benchmark]: TraceAbstraction took 6507.44 ms. Allocated memory was 202.9 MB in the beginning and 286.8 MB in the end (delta: 83.9 MB). Free memory was 169.1 MB in the beginning and 246.1 MB in the end (delta: -77.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:21:19,097 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.43 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.83 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 93.1 MB in the beginning and 182.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.16 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 169.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6507.44 ms. Allocated memory was 202.9 MB in the beginning and 286.8 MB in the end (delta: 83.9 MB). Free memory was 169.1 MB in the beginning and 246.1 MB in the end (delta: -77.0 MB). Peak memory consumption was 6.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 179 SDtfs, 111 SDslu, 1182 SDs, 0 SdLazy, 557 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 418 GetRequests, 305 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 40 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 19 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 8 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 512 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 498 ConstructedInterpolants, 0 QuantifiedInterpolants, 52080 SizeOfPredicates, 33 NumberOfNonLiveVariables, 564 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 282/360 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...