/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:57:08,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:57:08,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:57:08,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:57:08,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:57:08,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:57:08,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:57:08,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:57:08,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:57:08,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:57:08,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:57:08,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:57:08,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:57:08,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:57:08,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:57:08,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:57:08,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:57:08,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:57:08,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:57:08,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:57:08,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:57:08,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:57:08,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:57:08,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:57:08,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:57:08,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:57:08,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:57:08,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:57:08,319 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 [2020-07-21 10:57:08,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:57:08,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:57:08,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:57:08,335 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:57:08,335 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:57:08,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:57:08,336 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:57:08,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:57:08,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:57:08,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:57:08,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:57:08,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:57:08,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:57:08,337 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:57:08,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:57:08,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:57:08,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:57:08,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:57:08,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:57:08,338 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:57:08,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:57:08,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:57:08,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:57:08,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:57:08,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:57:08,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:57:08,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:08,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:57:08,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:57:08,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:57:08,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:57:08,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:57:08,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:57:08,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:57:08,639 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:57:08,640 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 10:57:08,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdc47860/29a2a677a08f43878edff6bb5191137b/FLAGe40c0badb [2020-07-21 10:57:09,173 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:57:09,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-07-21 10:57:09,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdc47860/29a2a677a08f43878edff6bb5191137b/FLAGe40c0badb [2020-07-21 10:57:09,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ebdc47860/29a2a677a08f43878edff6bb5191137b [2020-07-21 10:57:09,531 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:57:09,534 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:57:09,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:09,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:57:09,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:57:09,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0f170c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09, skipping insertion in model container [2020-07-21 10:57:09,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,550 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:57:09,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:57:09,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:09,748 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:57:09,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:57:09,780 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:57:09,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09 WrapperNode [2020-07-21 10:57:09,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:57:09,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:57:09,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:57:09,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:57:09,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (1/1) ... [2020-07-21 10:57:09,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:57:09,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:57:09,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:57:09,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:57:09,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (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 [2020-07-21 10:57:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:57:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:57:09,964 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:57:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:57:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:57:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:57:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:57:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:57:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:57:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:57:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:57:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:57:10,167 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:57:10,168 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:57:10,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:10 BoogieIcfgContainer [2020-07-21 10:57:10,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:57:10,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:57:10,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:57:10,177 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:57:10,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:57:09" (1/3) ... [2020-07-21 10:57:10,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b75f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:10, skipping insertion in model container [2020-07-21 10:57:10,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:57:09" (2/3) ... [2020-07-21 10:57:10,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b75f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:57:10, skipping insertion in model container [2020-07-21 10:57:10,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:57:10" (3/3) ... [2020-07-21 10:57:10,181 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-07-21 10:57:10,192 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:57:10,200 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:57:10,216 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:57:10,247 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:57:10,248 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:57:10,248 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:57:10,248 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:57:10,249 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:57:10,249 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:57:10,249 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:57:10,249 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:57:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:57:10,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:57:10,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:10,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:10,283 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:57:10,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:10,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615248646] [2020-07-21 10:57:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:10,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:10,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:10,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615248646] [2020-07-21 10:57:10,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:10,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:10,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26836019] [2020-07-21 10:57:10,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:10,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:10,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:10,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:10,509 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:57:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:10,620 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:57:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:10,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:57:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:10,633 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:57:10,633 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:57:10,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:57:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:57:10,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:10,694 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:57:10,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:10,695 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:10,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:10,695 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:10,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:57:10,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:10,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:10,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:10,913 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:10,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:10,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:57:10,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:10,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349682807] [2020-07-21 10:57:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:10,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:57:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:57:10,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:57:10,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349682807] [2020-07-21 10:57:10,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:57:10,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:57:10,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264764912] [2020-07-21 10:57:10,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:57:10,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:10,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:57:10,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:57:10,985 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:57:11,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:11,076 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:57:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:57:11,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:57:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:11,079 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:57:11,080 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:57:11,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:57:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:57:11,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:57:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:57:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:57:11,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:57:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:11,104 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:57:11,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:57:11,105 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:57:11,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:57:11,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:11,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:11,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:11,325 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:11,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:57:11,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:11,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461661451] [2020-07-21 10:57:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:11,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:11,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:11,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:11,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:11,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461661451] [2020-07-21 10:57:11,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:11,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:11,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729377960] [2020-07-21 10:57:11,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:11,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:11,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:11,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:11,700 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:57:11,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:11,856 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:57:11,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:11,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:57:11,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:11,861 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:57:11,861 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:57:11,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:57:11,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:57:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:11,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:57:11,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:11,883 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:11,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:57:11,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:11,888 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, 1, 1] [2020-07-21 10:57:12,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:12,101 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:12,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:12,101 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:57:12,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:12,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163424045] [2020-07-21 10:57:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:12,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:12,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:12,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:12,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:57:12,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163424045] [2020-07-21 10:57:12,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:12,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:57:12,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601577505] [2020-07-21 10:57:12,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:57:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:57:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:57:12,379 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:57:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:12,492 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:57:12,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:12,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:57:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:12,495 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:57:12,495 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:57:12,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:12,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:57:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:57:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:57:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:57:12,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:57:12,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:12,506 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:57:12,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:57:12,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:57:12,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:57:12,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:12,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:12,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:12,719 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:12,720 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:57:12,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:12,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138242848] [2020-07-21 10:57:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:12,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:57:12,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:13,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:13,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:13,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:57:13,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138242848] [2020-07-21 10:57:13,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:13,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:57:13,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085378450] [2020-07-21 10:57:13,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:57:13,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:57:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:57:13,227 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:57:13,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:13,400 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:57:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:13,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:57:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:13,402 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:57:13,403 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:57:13,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:57:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:57:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:57:13,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:57:13,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:57:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:13,415 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:57:13,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:57:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:57:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:57:13,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:13,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:13,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:13,621 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:13,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:57:13,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:13,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034163043] [2020-07-21 10:57:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:13,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:13,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:57:13,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:13,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:13,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:13,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:57:14,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034163043] [2020-07-21 10:57:14,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:14,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:14,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49962964] [2020-07-21 10:57:14,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:14,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:14,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:14,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:14,010 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 11 states. [2020-07-21 10:57:14,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:14,176 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:57:14,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:14,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-21 10:57:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:14,183 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:57:14,183 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:57:14,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:14,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:57:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:57:14,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:57:14,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:57:14,205 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:57:14,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:14,206 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:57:14,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:57:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:57:14,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:14,213 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:14,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:14,432 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:14,433 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:57:14,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:14,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378747378] [2020-07-21 10:57:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:14,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:14,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:57:14,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:14,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:14,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:14,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:57:15,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378747378] [2020-07-21 10:57:15,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:15,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:15,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529367208] [2020-07-21 10:57:15,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:15,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:15,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:15,081 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 13 states. [2020-07-21 10:57:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:15,265 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:57:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:15,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-07-21 10:57:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:15,268 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:57:15,268 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:57:15,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:57:15,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:57:15,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:57:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:57:15,280 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:57:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:15,280 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:57:15,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:57:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:57:15,283 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:15,283 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:15,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:15,492 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:15,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:15,493 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:57:15,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:15,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588497989] [2020-07-21 10:57:15,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 10:57:15,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:15,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-21 10:57:15,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588497989] [2020-07-21 10:57:15,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:15,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:15,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234059808] [2020-07-21 10:57:15,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:15,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:15,928 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 11 states. [2020-07-21 10:57:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:16,093 INFO L93 Difference]: Finished difference Result 69 states and 116 transitions. [2020-07-21 10:57:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:16,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 54 [2020-07-21 10:57:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:16,096 INFO L225 Difference]: With dead ends: 69 [2020-07-21 10:57:16,096 INFO L226 Difference]: Without dead ends: 65 [2020-07-21 10:57:16,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-07-21 10:57:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2020-07-21 10:57:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 10:57:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2020-07-21 10:57:16,126 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 54 [2020-07-21 10:57:16,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:16,127 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2020-07-21 10:57:16,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:16,127 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2020-07-21 10:57:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-21 10:57:16,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:16,129 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:16,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:16,346 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-07-21 10:57:16,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:16,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417417157] [2020-07-21 10:57:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:57:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 10:57:16,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:16,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:16,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 10:57:16,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417417157] [2020-07-21 10:57:16,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:16,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 10:57:16,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402509093] [2020-07-21 10:57:16,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:57:16,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:57:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:57:16,612 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand 9 states. [2020-07-21 10:57:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:16,736 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2020-07-21 10:57:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:57:16,737 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-07-21 10:57:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:16,739 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:57:16,739 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:57:16,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:57:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-07-21 10:57:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-21 10:57:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 73 transitions. [2020-07-21 10:57:16,751 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 73 transitions. Word has length 55 [2020-07-21 10:57:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:16,752 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 73 transitions. [2020-07-21 10:57:16,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:57:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 73 transitions. [2020-07-21 10:57:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 10:57:16,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:16,754 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:16,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:16,967 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:16,968 INFO L82 PathProgramCache]: Analyzing trace with hash 643857677, now seen corresponding path program 1 times [2020-07-21 10:57:16,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:16,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65246814] [2020-07-21 10:57:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:17,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:17,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 11 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-07-21 10:57:17,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:17,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 10:57:17,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65246814] [2020-07-21 10:57:17,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:17,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:17,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079177153] [2020-07-21 10:57:17,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:17,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:17,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:17,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:17,441 INFO L87 Difference]: Start difference. First operand 49 states and 73 transitions. Second operand 11 states. [2020-07-21 10:57:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:17,577 INFO L93 Difference]: Finished difference Result 66 states and 108 transitions. [2020-07-21 10:57:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:17,578 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-07-21 10:57:17,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:17,580 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:57:17,580 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:57:17,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:57:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-07-21 10:57:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:57:17,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2020-07-21 10:57:17,591 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 67 [2020-07-21 10:57:17,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:17,591 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2020-07-21 10:57:17,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:17,592 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2020-07-21 10:57:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 10:57:17,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:17,593 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:17,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:17,808 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 2 times [2020-07-21 10:57:17,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:17,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423004910] [2020-07-21 10:57:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:17,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjunts are in the unsatisfiable core [2020-07-21 10:57:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 10:57:18,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-07-21 10:57:18,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423004910] [2020-07-21 10:57:18,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:18,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-07-21 10:57:18,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411824399] [2020-07-21 10:57:18,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:57:18,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:57:18,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:57:18,527 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand 21 states. [2020-07-21 10:57:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:18,724 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2020-07-21 10:57:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 10:57:18,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-07-21 10:57:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:18,727 INFO L225 Difference]: With dead ends: 94 [2020-07-21 10:57:18,727 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 10:57:18,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:57:18,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 10:57:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2020-07-21 10:57:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-21 10:57:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2020-07-21 10:57:18,762 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 68 [2020-07-21 10:57:18,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:18,762 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2020-07-21 10:57:18,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:57:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2020-07-21 10:57:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 10:57:18,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:18,765 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:18,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:18,970 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-07-21 10:57:18,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:18,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862057521] [2020-07-21 10:57:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:19,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:19,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-07-21 10:57:19,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:19,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:57:19,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862057521] [2020-07-21 10:57:19,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:19,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:19,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194447996] [2020-07-21 10:57:19,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:19,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:19,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:19,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:19,648 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand 13 states. [2020-07-21 10:57:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:19,821 INFO L93 Difference]: Finished difference Result 100 states and 214 transitions. [2020-07-21 10:57:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:19,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 10:57:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:19,828 INFO L225 Difference]: With dead ends: 100 [2020-07-21 10:57:19,828 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 10:57:19,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 10:57:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 10:57:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 10:57:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 10:57:19,841 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 82 [2020-07-21 10:57:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:19,842 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 10:57:19,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:19,842 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 10:57:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 10:57:19,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:19,844 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:20,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:20,059 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1751947273, now seen corresponding path program 3 times [2020-07-21 10:57:20,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:20,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005954028] [2020-07-21 10:57:20,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:20,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:57:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 10:57:20,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:20,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-21 10:57:20,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005954028] [2020-07-21 10:57:20,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:20,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-21 10:57:20,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614812130] [2020-07-21 10:57:20,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:57:20,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:57:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:57:20,490 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 11 states. [2020-07-21 10:57:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:20,646 INFO L93 Difference]: Finished difference Result 100 states and 219 transitions. [2020-07-21 10:57:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:57:20,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 69 [2020-07-21 10:57:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:20,649 INFO L225 Difference]: With dead ends: 100 [2020-07-21 10:57:20,649 INFO L226 Difference]: Without dead ends: 96 [2020-07-21 10:57:20,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:57:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-21 10:57:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2020-07-21 10:57:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 10:57:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 151 transitions. [2020-07-21 10:57:20,665 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 151 transitions. Word has length 69 [2020-07-21 10:57:20,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:20,666 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 151 transitions. [2020-07-21 10:57:20,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:57:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 151 transitions. [2020-07-21 10:57:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 10:57:20,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:20,668 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:20,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:20,883 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1082273126, now seen corresponding path program 3 times [2020-07-21 10:57:20,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:20,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355081914] [2020-07-21 10:57:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:57:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 44 proven. 14 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 10:57:20,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:21,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 10:57:21,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355081914] [2020-07-21 10:57:21,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:21,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 10:57:21,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267963818] [2020-07-21 10:57:21,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:21,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:21,412 INFO L87 Difference]: Start difference. First operand 77 states and 151 transitions. Second operand 13 states. [2020-07-21 10:57:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:21,606 INFO L93 Difference]: Finished difference Result 97 states and 206 transitions. [2020-07-21 10:57:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:21,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 10:57:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:21,608 INFO L225 Difference]: With dead ends: 97 [2020-07-21 10:57:21,608 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:57:21,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:57:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:57:21,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 64. [2020-07-21 10:57:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 10:57:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 112 transitions. [2020-07-21 10:57:21,621 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 112 transitions. Word has length 80 [2020-07-21 10:57:21,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:21,622 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 112 transitions. [2020-07-21 10:57:21,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:21,622 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 112 transitions. [2020-07-21 10:57:21,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 10:57:21,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:21,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:21,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:21,829 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:21,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 1 times [2020-07-21 10:57:21,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:21,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77479983] [2020-07-21 10:57:21,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:21,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:57:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 10:57:21,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:22,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:57:22,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77479983] [2020-07-21 10:57:22,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:22,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-21 10:57:22,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600918683] [2020-07-21 10:57:22,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:22,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:22,442 INFO L87 Difference]: Start difference. First operand 64 states and 112 transitions. Second operand 13 states. [2020-07-21 10:57:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:22,638 INFO L93 Difference]: Finished difference Result 97 states and 209 transitions. [2020-07-21 10:57:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:22,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 69 [2020-07-21 10:57:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:22,643 INFO L225 Difference]: With dead ends: 97 [2020-07-21 10:57:22,643 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 10:57:22,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:57:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 10:57:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 10:57:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 10:57:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 92 transitions. [2020-07-21 10:57:22,656 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 92 transitions. Word has length 69 [2020-07-21 10:57:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:22,656 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 92 transitions. [2020-07-21 10:57:22,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 92 transitions. [2020-07-21 10:57:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 10:57:22,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:22,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:22,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:22,875 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 817110694, now seen corresponding path program 4 times [2020-07-21 10:57:22,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:22,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460497517] [2020-07-21 10:57:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:22,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:57:22,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 10:57:22,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:23,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:23,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:23,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:23,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 10:57:23,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460497517] [2020-07-21 10:57:23,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:23,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2020-07-21 10:57:23,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173317623] [2020-07-21 10:57:23,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:57:23,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:23,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:57:23,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:57:23,406 INFO L87 Difference]: Start difference. First operand 64 states and 92 transitions. Second operand 13 states. [2020-07-21 10:57:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:23,594 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-07-21 10:57:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:57:23,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-21 10:57:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:23,604 INFO L225 Difference]: With dead ends: 86 [2020-07-21 10:57:23,604 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 10:57:23,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:57:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 10:57:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 10:57:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 10:57:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 10:57:23,611 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 80 [2020-07-21 10:57:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:23,612 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 10:57:23,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:57:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 10:57:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 10:57:23,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:23,614 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:23,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:23,827 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 10:57:23,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:23,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427720314] [2020-07-21 10:57:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:23,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 10:57:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-07-21 10:57:23,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:24,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:24,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:24,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:24,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-07-21 10:57:24,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427720314] [2020-07-21 10:57:24,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:24,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-07-21 10:57:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137364932] [2020-07-21 10:57:24,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:57:24,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:57:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:57:24,591 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 15 states. [2020-07-21 10:57:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:24,780 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-07-21 10:57:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:57:24,780 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-07-21 10:57:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:24,781 INFO L225 Difference]: With dead ends: 89 [2020-07-21 10:57:24,781 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:57:24,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:57:24,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:57:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:57:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:57:24,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:57:24,784 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-07-21 10:57:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:24,784 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:57:24,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:57:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:57:24,784 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:57:24,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:24,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:57:25,914 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-07-21 10:57:26,263 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2020-07-21 10:57:26,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:57:26,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:57:26,266 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:57:26,267 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:57:26,267 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:57:26,267 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:57:26,267 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-21 10:57:26,267 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-21 10:57:26,267 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-21 10:57:26,267 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-21 10:57:26,267 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-21 10:57:26,268 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-21 10:57:26,268 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-07-21 10:57:26,268 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-21 10:57:26,268 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-21 10:57:26,268 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-21 10:57:26,268 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#in~n| fibo2_~n) (<= 2 |fibo2_#in~n|)) [2020-07-21 10:57:26,268 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-21 10:57:26,269 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (or (and (= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|)) (<= 4 |fibo2_#in~n|)) (<= |fibo2_#in~n| fibo2_~n)) [2020-07-21 10:57:26,269 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-21 10:57:26,269 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-21 10:57:26,269 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-21 10:57:26,269 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-21 10:57:26,269 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-21 10:57:26,269 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-21 10:57:26,270 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo1_#in~n|) (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)) [2020-07-21 10:57:26,270 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-21 10:57:26,270 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (or (and .cse0 (<= 3 |fibo1_#in~n|)) (and (<= 2 |fibo1_#in~n|) .cse0 (= 1 |fibo1_#t~ret0|)))) (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n))) (or (and (= 2 |fibo1_#t~ret0|) .cse1) (and .cse1 (<= |fibo1_#in~n| 3)) (and (<= 5 |fibo1_#in~n|) .cse1)))) [2020-07-21 10:57:26,270 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-21 10:57:26,270 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-21 10:57:26,270 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-21 10:57:26,270 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-21 10:57:26,271 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-21 10:57:26,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:57:26 BoogieIcfgContainer [2020-07-21 10:57:26,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:57:26,277 INFO L168 Benchmark]: Toolchain (without parser) took 16744.58 ms. Allocated memory was 137.4 MB in the beginning and 346.0 MB in the end (delta: 208.7 MB). Free memory was 102.3 MB in the beginning and 126.1 MB in the end (delta: -23.8 MB). Peak memory consumption was 222.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:57:26,278 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:57:26,279 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.53 ms. Allocated memory is still 137.4 MB. Free memory was 101.9 MB in the beginning and 92.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:57:26,279 INFO L168 Benchmark]: Boogie Preprocessor took 28.57 ms. Allocated memory is still 137.4 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:57:26,280 INFO L168 Benchmark]: RCFGBuilder took 361.78 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.9 MB in the beginning and 167.0 MB in the end (delta: -76.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:57:26,281 INFO L168 Benchmark]: TraceAbstraction took 16102.15 ms. Allocated memory was 200.8 MB in the beginning and 346.0 MB in the end (delta: 145.2 MB). Free memory was 166.3 MB in the beginning and 126.1 MB in the end (delta: 40.2 MB). Peak memory consumption was 222.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:57:26,284 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.53 ms. Allocated memory is still 137.4 MB. Free memory was 101.9 MB in the beginning and 92.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.57 ms. Allocated memory is still 137.4 MB. Free memory was 92.3 MB in the beginning and 90.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 361.78 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 90.9 MB in the beginning and 167.0 MB in the end (delta: -76.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 16102.15 ms. Allocated memory was 200.8 MB in the beginning and 346.0 MB in the end (delta: 145.2 MB). Free memory was 166.3 MB in the beginning and 126.1 MB in the end (delta: 40.2 MB). Peak memory consumption was 222.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.7s, OverallIterations: 17, TraceHistogramMax: 7, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 470 SDtfs, 435 SDslu, 2603 SDs, 0 SdLazy, 2042 SolverSat, 242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1849 GetRequests, 1544 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 162 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 71 PreInvPairs, 292 NumberOfFragments, 92 HoareAnnotationTreeSize, 71 FomulaSimplifications, 103936 FormulaSimplificationTreeSizeReduction, 0.7s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1276 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 915 NumberOfCodeBlocks, 915 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 1771 ConstructedInterpolants, 0 QuantifiedInterpolants, 231460 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2051 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 32 InterpolantComputations, 2 PerfectInterpolantSequences, 1521/2030 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...