/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:16:54,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:16:54,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:16:54,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:16:54,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:16:54,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:16:54,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:16:54,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:16:54,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:16:54,304 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:16:54,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:16:54,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:16:54,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:16:54,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:16:54,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:16:54,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:16:54,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:16:54,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:16:54,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:16:54,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:16:54,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:16:54,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:16:54,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:16:54,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:16:54,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-19 23:16:54,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-19 23:16:54,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-19 23:16:54,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-19 23:16:54,323 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-19 23:16:54,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-19 23:16:54,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:16:54,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:16:54,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:16:54,331 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 [2020-07-19 23:16:54,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:16:54,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:16:54,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:16:54,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:16:54,347 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:16:54,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:16:54,348 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:16:54,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:16:54,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:16:54,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:16:54,348 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:16:54,349 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:16:54,349 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:16:54,349 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:16:54,349 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:16:54,349 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:16:54,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:16:54,350 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:16:54,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:16:54,350 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:16:54,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:16:54,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:16:54,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:16:54,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:16:54,351 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:16:54,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:16:54,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:16:54,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:16:54,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:16:54,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:16:54,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:16:54,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:16:54,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:16:54,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:16:54,678 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:16:54,679 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-19 23:16:54,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9e75c38/eb03fec8bd414dfd8ec15cceb710177f/FLAG119bda9a4 [2020-07-19 23:16:55,288 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:16:55,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-2.c [2020-07-19 23:16:55,297 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9e75c38/eb03fec8bd414dfd8ec15cceb710177f/FLAG119bda9a4 [2020-07-19 23:16:55,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9e75c38/eb03fec8bd414dfd8ec15cceb710177f [2020-07-19 23:16:55,689 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:16:55,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:16:55,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:16:55,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:16:55,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:16:55,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bbde3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55, skipping insertion in model container [2020-07-19 23:16:55,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:16:55,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:16:55,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:16:55,912 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:16:55,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:16:55,941 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:16:55,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55 WrapperNode [2020-07-19 23:16:55,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:16:55,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:16:55,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:16:55,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:16:55,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (1/1) ... [2020-07-19 23:16:55,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:16:55,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:16:55,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:16:55,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:16:55,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (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 [2020-07-19 23:16:56,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:16:56,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:16:56,141 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-19 23:16:56,141 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:16:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:16:56,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:16:56,142 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-19 23:16:56,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:16:56,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:16:56,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:16:56,329 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:16:56,330 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:16:56,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:16:56 BoogieIcfgContainer [2020-07-19 23:16:56,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:16:56,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:16:56,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:16:56,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:16:56,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:16:55" (1/3) ... [2020-07-19 23:16:56,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1073ad2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:16:56, skipping insertion in model container [2020-07-19 23:16:56,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:16:55" (2/3) ... [2020-07-19 23:16:56,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1073ad2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:16:56, skipping insertion in model container [2020-07-19 23:16:56,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:16:56" (3/3) ... [2020-07-19 23:16:56,350 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2020-07-19 23:16:56,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:16:56,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:16:56,415 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:16:56,450 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:16:56,450 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:16:56,450 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:16:56,450 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:16:56,451 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:16:56,451 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:16:56,451 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:16:56,451 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:16:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-19 23:16:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:16:56,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:56,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:56,477 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:56,482 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-19 23:16:56,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:56,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672441888] [2020-07-19 23:16:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:16:56,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672441888] [2020-07-19 23:16:56,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:16:56,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:16:56,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596832782] [2020-07-19 23:16:56,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:16:56,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:56,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:16:56,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:16:56,713 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-19 23:16:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:56,827 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-19 23:16:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:16:56,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:16:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:56,839 INFO L225 Difference]: With dead ends: 35 [2020-07-19 23:16:56,839 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:16:56,843 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 [2020-07-19 23:16:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:16:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:16:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:16:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 23:16:56,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-19 23:16:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:56,892 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 23:16:56,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:16:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 23:16:56,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-19 23:16:56,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:56,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:56,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:16:56,896 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-19 23:16:56,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:56,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57120481] [2020-07-19 23:16:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:16:56,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57120481] [2020-07-19 23:16:56,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:16:56,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:16:56,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702039761] [2020-07-19 23:16:56,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:16:56,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:16:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:16:56,973 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-19 23:16:57,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:57,037 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-19 23:16:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:16:57,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-19 23:16:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:57,039 INFO L225 Difference]: With dead ends: 27 [2020-07-19 23:16:57,040 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 23:16:57,041 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 [2020-07-19 23:16:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 23:16:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-19 23:16:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:16:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-19 23:16:57,050 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-19 23:16:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:57,051 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-19 23:16:57,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:16:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-19 23:16:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 23:16:57,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:57,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:57,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:16:57,053 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-19 23:16:57,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:57,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660734240] [2020-07-19 23:16:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:16:57,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660734240] [2020-07-19 23:16:57,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157320936] [2020-07-19 23:16:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65c48403 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 [2020-07-19 23:16:57,253 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65c48403 issued 3 check-sat command(s) [2020-07-19 23:16:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:57,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:16:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-19 23:16:57,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:57,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-07-19 23:16:57,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316549292] [2020-07-19 23:16:57,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:16:57,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:57,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:16:57,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:16:57,340 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-19 23:16:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:57,478 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2020-07-19 23:16:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:16:57,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 23:16:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:57,480 INFO L225 Difference]: With dead ends: 38 [2020-07-19 23:16:57,481 INFO L226 Difference]: Without dead ends: 23 [2020-07-19 23:16:57,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:16:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-19 23:16:57,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-19 23:16:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 23:16:57,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-19 23:16:57,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2020-07-19 23:16:57,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:57,490 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-19 23:16:57,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:16:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-19 23:16:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-19 23:16:57,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:57,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:57,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 23:16:57,708 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:57,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-19 23:16:57,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:57,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664062091] [2020-07-19 23:16:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:16:57,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664062091] [2020-07-19 23:16:57,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220444109] [2020-07-19 23:16:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39785c5f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:57,909 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@39785c5f issued 3 check-sat command(s) [2020-07-19 23:16:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:16:57,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-19 23:16:57,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:57,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-19 23:16:57,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581134077] [2020-07-19 23:16:57,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:16:57,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:57,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:16:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:16:57,937 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-07-19 23:16:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:58,046 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-07-19 23:16:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:16:58,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-19 23:16:58,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:58,050 INFO L225 Difference]: With dead ends: 41 [2020-07-19 23:16:58,050 INFO L226 Difference]: Without dead ends: 37 [2020-07-19 23:16:58,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:16:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-19 23:16:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-07-19 23:16:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 23:16:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2020-07-19 23:16:58,062 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 27 [2020-07-19 23:16:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:58,063 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2020-07-19 23:16:58,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:16:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2020-07-19 23:16:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 23:16:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:58,065 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:58,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:58,279 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:58,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:58,280 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2020-07-19 23:16:58,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:58,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703002705] [2020-07-19 23:16:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-19 23:16:58,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703002705] [2020-07-19 23:16:58,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123695500] [2020-07-19 23:16:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f28b7c6 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 [2020-07-19 23:16:58,484 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4f28b7c6 issued 3 check-sat command(s) [2020-07-19 23:16:58,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:58,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:16:58,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-19 23:16:58,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:58,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2020-07-19 23:16:58,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671529824] [2020-07-19 23:16:58,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:16:58,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:58,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:16:58,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:16:58,567 INFO L87 Difference]: Start difference. First operand 37 states and 51 transitions. Second operand 12 states. [2020-07-19 23:16:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:58,814 INFO L93 Difference]: Finished difference Result 72 states and 109 transitions. [2020-07-19 23:16:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:16:58,815 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-19 23:16:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:58,817 INFO L225 Difference]: With dead ends: 72 [2020-07-19 23:16:58,817 INFO L226 Difference]: Without dead ends: 41 [2020-07-19 23:16:58,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:16:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-19 23:16:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-07-19 23:16:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 23:16:58,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-07-19 23:16:58,830 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 40 [2020-07-19 23:16:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:58,831 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-07-19 23:16:58,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:16:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-07-19 23:16:58,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-19 23:16:58,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:58,834 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:59,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:59,049 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:59,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2020-07-19 23:16:59,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:59,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910862702] [2020-07-19 23:16:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 23:16:59,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910862702] [2020-07-19 23:16:59,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320370089] [2020-07-19 23:16:59,296 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@560535f0 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:59,350 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@560535f0 issued 3 check-sat command(s) [2020-07-19 23:16:59,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:16:59,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:16:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:16:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-19 23:16:59,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:16:59,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-19 23:16:59,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898684916] [2020-07-19 23:16:59,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:16:59,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:16:59,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:16:59,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:16:59,394 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 9 states. [2020-07-19 23:16:59,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:16:59,542 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2020-07-19 23:16:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:16:59,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2020-07-19 23:16:59,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:16:59,547 INFO L225 Difference]: With dead ends: 83 [2020-07-19 23:16:59,547 INFO L226 Difference]: Without dead ends: 79 [2020-07-19 23:16:59,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:16:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-19 23:16:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2020-07-19 23:16:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-19 23:16:59,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 101 transitions. [2020-07-19 23:16:59,564 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 101 transitions. Word has length 68 [2020-07-19 23:16:59,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:16:59,565 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 101 transitions. [2020-07-19 23:16:59,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:16:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 101 transitions. [2020-07-19 23:16:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-19 23:16:59,569 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:16:59,569 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:16:59,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:16:59,784 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:16:59,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:16:59,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2068257585, now seen corresponding path program 4 times [2020-07-19 23:16:59,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:16:59,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735777934] [2020-07-19 23:16:59,787 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:16:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:16:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:17:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 249 proven. 381 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-19 23:17:00,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735777934] [2020-07-19 23:17:00,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154976191] [2020-07-19 23:17:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75372afc No working directory specified, using /storage/repos/ultimate/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 [2020-07-19 23:17:00,550 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@75372afc issued 4 check-sat command(s) [2020-07-19 23:17:00,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:17:00,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:17:00,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:17:00,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 327 proven. 131 refuted. 0 times theorem prover too weak. 698 trivial. 0 not checked. [2020-07-19 23:17:00,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:17:00,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2020-07-19 23:17:00,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178567386] [2020-07-19 23:17:00,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:17:00,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:17:00,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:17:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:17:00,631 INFO L87 Difference]: Start difference. First operand 73 states and 101 transitions. Second operand 15 states. [2020-07-19 23:17:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:17:01,242 INFO L93 Difference]: Finished difference Result 146 states and 255 transitions. [2020-07-19 23:17:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:17:01,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 150 [2020-07-19 23:17:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:17:01,246 INFO L225 Difference]: With dead ends: 146 [2020-07-19 23:17:01,246 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 23:17:01,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-07-19 23:17:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 23:17:01,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-07-19 23:17:01,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 23:17:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-07-19 23:17:01,268 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 150 [2020-07-19 23:17:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:17:01,269 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-07-19 23:17:01,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:17:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-07-19 23:17:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 23:17:01,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:17:01,271 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:17:01,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 23:17:01,487 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:17:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:17:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-19 23:17:01,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:17:01,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190765726] [2020-07-19 23:17:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7d63fc6b [2020-07-19 23:17:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:17:01,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:17:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:17:01,530 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:17:01,553 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:17:01,553 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:17:01,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-19 23:17:01,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:17:01 BoogieIcfgContainer [2020-07-19 23:17:01,598 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:17:01,601 INFO L168 Benchmark]: Toolchain (without parser) took 5909.66 ms. Allocated memory was 146.3 MB in the beginning and 280.0 MB in the end (delta: 133.7 MB). Free memory was 104.1 MB in the beginning and 157.4 MB in the end (delta: -53.3 MB). Peak memory consumption was 80.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:01,602 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-19 23:17:01,603 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.90 ms. Allocated memory is still 146.3 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:01,604 INFO L168 Benchmark]: Boogie Preprocessor took 26.67 ms. Allocated memory is still 146.3 MB. Free memory was 94.0 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:01,605 INFO L168 Benchmark]: RCFGBuilder took 366.02 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 92.7 MB in the beginning and 169.4 MB in the end (delta: -76.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:01,605 INFO L168 Benchmark]: TraceAbstraction took 5258.99 ms. Allocated memory was 201.9 MB in the beginning and 280.0 MB in the end (delta: 78.1 MB). Free memory was 169.4 MB in the beginning and 157.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:17:01,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.90 ms. Allocated memory is still 146.3 MB. Free memory was 103.7 MB in the beginning and 94.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.67 ms. Allocated memory is still 146.3 MB. Free memory was 94.0 MB in the beginning and 92.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 366.02 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 92.7 MB in the beginning and 169.4 MB in the end (delta: -76.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5258.99 ms. Allocated memory was 201.9 MB in the beginning and 280.0 MB in the end (delta: 78.1 MB). Free memory was 169.4 MB in the beginning and 157.4 MB in the end (delta: 12.0 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L24] int x = 5; VAL [x=5] [L25] CALL, EXPR fibo(x) VAL [\old(n)=5] [L6] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L8] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=4] [L6] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L8] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=4, fibo(n-1)=2, n=4] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=4, fibo(n-1)=2, fibo(n-2)=1, n=4] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=5, fibo(n-1)=3, n=5] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=3] [L6] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L8] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=2] [L6] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L8] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L11] CALL, EXPR fibo(n-1) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-1) VAL [\old(n)=2, fibo(n-1)=1, n=2] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=0] [L6] COND TRUE n < 1 [L7] return 0; VAL [\old(n)=0, \result=0, n=0] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=2, fibo(n-1)=1, fibo(n-2)=0, n=2] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-1) VAL [\old(n)=3, fibo(n-1)=1, n=3] [L11] CALL, EXPR fibo(n-2) VAL [\old(n)=1] [L6] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L8] COND TRUE n == 1 [L9] return 1; VAL [\old(n)=1, \result=1, n=1] [L11] RET, EXPR fibo(n-2) VAL [\old(n)=3, fibo(n-1)=1, fibo(n-2)=1, n=3] [L11] return fibo(n-1) + fibo(n-2); [L11] RET, EXPR fibo(n-2) VAL [\old(n)=5, fibo(n-1)=3, fibo(n-2)=2, n=5] [L11] return fibo(n-1) + fibo(n-2); [L25] RET, EXPR fibo(x) VAL [fibo(x)=5, x=5] [L25] int result = fibo(x); [L26] COND TRUE result == 5 VAL [result=5, x=5] [L27] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 236 SDslu, 399 SDs, 0 SdLazy, 669 SolverSat, 179 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 497 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred 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, 7 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 758 NumberOfCodeBlocks, 720 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 637 ConstructedInterpolants, 0 QuantifiedInterpolants, 103465 SizeOfPredicates, 21 NumberOfNonLiveVariables, 641 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 2097/2834 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...